diff --git a/dist/entry.js b/dist/entry.js
index fe20753bd7..9110b1da2c 100644
--- a/dist/entry.js
+++ b/dist/entry.js
@@ -856,8 +856,8 @@ Blockly.Blocks.arduino_toggle_led = {init:function() {
   this.setNextStatement(!0);
 }};
 Entry.block.arduino_toggle_led = function(b, a) {
-  var c = a.getNumberValue("VALUE"), d = a.getField("OPERATOR");
-  Entry.hw.setDigitalPortValue(c, "on" == d ? 255 : 0);
+  var c = a.getNumberValue("VALUE"), d = "on" == a.getField("OPERATOR") ? 255 : 0;
+  Entry.hw.setDigitalPortValue(c, d);
   return a.callReturn();
 };
 Blockly.Blocks.arduino_toggle_pwm = {init:function() {
@@ -1057,8 +1057,8 @@ Blockly.Blocks.dplay_select_led = {init:function() {
 Entry.block.dplay_select_led = function(b, a) {
   var c = a.getField("PORT"), d = 7;
   "7" == c ? d = 7 : "8" == c ? d = 8 : "9" == c ? d = 9 : "10" == c && (d = 10);
-  c = a.getField("OPERATOR");
-  Entry.hw.setDigitalPortValue(d, "on" == c ? 255 : 0);
+  c = "on" == a.getField("OPERATOR") ? 255 : 0;
+  Entry.hw.setDigitalPortValue(d, c);
   return a.callReturn();
 };
 Blockly.Blocks.dplay_get_switch_status = {init:function() {
@@ -2068,10 +2068,10 @@ Entry.block.wait_second = function(b, a) {
   }
   a.isStart = !0;
   a.timeFlag = 1;
-  var c = a.getNumberValue("SECOND", a);
+  var c = a.getNumberValue("SECOND", a), c = 60 / (Entry.FPS || 60) * c * 1E3;
   setTimeout(function() {
     a.timeFlag = 0;
-  }, 60 / (Entry.FPS || 60) * c * 1E3);
+  }, c);
   return a;
 };
 Blockly.Blocks.repeat_basic = {init:function() {
@@ -7807,12 +7807,7 @@ p.generateView = function(b, a) {
     this.view = c;
     Entry.isForLecture && c.addClass("lecture");
     this.parentView_.appendChild(c);
-    if (!Entry.isForLecture) {
-      var d = Entry.createElement("div", "entryBlockHelperHeaderWorkspace");
-      d.innerHTML = Lang.Helper.Block_info;
-      c.appendChild(d);
-    }
-    d = Entry.createElement("div", "entryBlockHelperContentWorkspace");
+    var d = Entry.createElement("div", "entryBlockHelperContentWorkspace");
     d.addClass("entryBlockHelperIntro");
     Entry.isForLecture && d.addClass("lecture");
     c.appendChild(d);
@@ -15298,7 +15293,7 @@ Entry.BlockMenu = function(b, a, c, d) {
   b.getCategoryCodes = function(a) {
     a = this._convertSelector(a);
     var b = this._categoryCodes[a];
-    b || (b = []);
+    b || (this._generateCategoryElement(a), b = []);
     b instanceof Entry.Code || (b = this._categoryCodes[a] = new Entry.Code(b));
     return b;
   };
@@ -15427,18 +15422,21 @@ Entry.BlockMenu = function(b, a, c, d) {
   };
   b._generateCategoryView = function(a) {
     if (a) {
-      for (var b = this, d = 0;d < a.length;d++) {
-        var e = a[d].category;
-        (function(a, d) {
-          a.text(Lang.Blocks[d.toUpperCase()]);
-          b._categoryElems[d] = a;
-          a.bindOnClick(function(a) {
-            b.selectMenu(d);
-          });
-        })(Entry.Dom("li", {id:"entryCategory" + e, class:"entryCategoryElementWorkspace", parent:this._categoryCol}), e);
+      for (var b = 0;b < a.length;b++) {
+        this._generateCategoryElement(a[b].category);
       }
     }
   };
+  b._generateCategoryElement = function(a) {
+    var b = this;
+    (function(a, e) {
+      a.text(Lang.Blocks[e.toUpperCase()]);
+      b._categoryElems[e] = a;
+      a.bindOnClick(function(a) {
+        b.selectMenu(e);
+      });
+    })(Entry.Dom("li", {id:"entryCategory" + a, class:"entryCategoryElementWorkspace", parent:this._categoryCol}), a);
+  };
   b.updateOffset = function() {
     this._offset = this.svgDom.offset();
   };
diff --git a/dist/entry.min.js b/dist/entry.min.js
index 597adc0aed..d6431e0056 100644
--- a/dist/entry.min.js
+++ b/dist/entry.min.js
@@ -86,7 +86,7 @@ Blockly.Blocks.arduino_get_pwm_port_number={init:function(){this.setColour("#009
 Blockly.Blocks.arduino_get_number_sensor_value={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_num_sensor_value_1);this.appendValueInput("VALUE").setCheck(["Number","String",null]);this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_num_sensor_value_2).appendField(" ");this.setInputsInline(!0);this.setOutput(!0,"Number")}};Entry.block.arduino_get_number_sensor_value=function(b,a){var c=a.getValue("VALUE",a);return Entry.hw.getAnalogPortValue(c[1])};
 Blockly.Blocks.arduino_get_digital_value={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_get_digital_value_1);this.appendValueInput("VALUE").setCheck("Number");this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_num_sensor_value_2).appendField(" ");this.setInputsInline(!0);this.setOutput(!0,"Boolean")}};Entry.block.arduino_get_digital_value=function(b,a){var c=a.getNumberValue("VALUE",a);return Entry.hw.getDigitalPortValue(c)};
 Blockly.Blocks.arduino_toggle_led={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_num_pin_1);this.appendValueInput("VALUE").setCheck(["Number","String",null]);this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_num_pin_2);this.appendDummyInput().appendField(new Blockly.FieldDropdown([[Lang.Blocks.ARDUINO_on,"on"],[Lang.Blocks.ARDUINO_off,"off"]]),"OPERATOR").appendField(new Blockly.FieldIcon(Entry.mediaFilePath+"block_icon/hardware_03.png","*"));
-this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)}};Entry.block.arduino_toggle_led=function(b,a){var c=a.getNumberValue("VALUE"),d=a.getField("OPERATOR");Entry.hw.setDigitalPortValue(c,"on"==d?255:0);return a.callReturn()};
+this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)}};Entry.block.arduino_toggle_led=function(b,a){var c=a.getNumberValue("VALUE"),d="on"==a.getField("OPERATOR")?255:0;Entry.hw.setDigitalPortValue(c,d);return a.callReturn()};
 Blockly.Blocks.arduino_toggle_pwm={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_toggle_pwm_1);this.appendValueInput("PORT").setCheck(["Number","String"]);this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_toggle_pwm_2);this.appendValueInput("VALUE").setCheck(["Number","String"]);this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_toggle_pwm_3);this.appendDummyInput().appendField(new Blockly.FieldIcon(Entry.mediaFilePath+"block_icon/hardware_03.png",
 "*"));this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)}};Entry.block.arduino_toggle_pwm=function(b,a){var c=a.getNumberValue("PORT"),d=a.getNumberValue("VALUE"),d=Math.round(d),d=Math.max(d,0),d=Math.min(d,255);Entry.hw.setDigitalPortValue(c,d);return a.callReturn()};
 Blockly.Blocks.arduino_convert_scale={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_convert_scale_1);this.appendValueInput("VALUE1").setCheck(["Number","String",null]);this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_convert_scale_2);this.appendValueInput("VALUE2").setCheck(["Number","String",null]);this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_convert_scale_3);this.appendValueInput("VALUE3").setCheck(["Number","String",null]);this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_convert_scale_4);
@@ -114,7 +114,7 @@ Entry.block.CODEino_get_accelerometer_direction=function(b,a){var c=a.getField("
 Blockly.Blocks.CODEino_get_accelerometer_value={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField(Lang.Blocks.CODEino_string_8).appendField(new Blockly.FieldDropdown([[Lang.Blocks.CODEino_accelerometer_X,"3"],[Lang.Blocks.CODEino_accelerometer_Y,"4"],[Lang.Blocks.CODEino_accelerometer_Z,"5"]]),"PORT").appendField(Lang.Blocks.CODEino_string_9);this.setOutput(!0,"Number");this.setInputsInline(!0)}};
 Entry.block.CODEino_get_accelerometer_value=function(b,a){var c=265,d=402,e=-90,f=90,g=Entry.hw.getAnalogPortValue(a.getField("PORT",a));if(c>d)var h=c,c=d,d=h;e>f&&(h=e,e=f,f=h);g=(f-e)/(d-c)*(g-c);g+=e;g=Math.min(f,g);g=Math.max(e,g);return Math.round(g)};
 Blockly.Blocks.dplay_select_led={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField(Lang.Blocks.ARDUINO_num_pin_1);this.appendDummyInput().appendField(new Blockly.FieldDropdown([["7","7"],["8","8"],["9","9"],["10","10"]]),"PORT");this.appendDummyInput().appendField(Lang.Blocks.dplay_num_pin_1);this.appendDummyInput().appendField(new Blockly.FieldDropdown([[Lang.Blocks.ARDUINO_on,"on"],[Lang.Blocks.ARDUINO_off,"off"]]),"OPERATOR").appendField(new Blockly.FieldIcon(Entry.mediaFilePath+
-"block_icon/hardware_03.png","*"));this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)}};Entry.block.dplay_select_led=function(b,a){var c=a.getField("PORT"),d=7;"7"==c?d=7:"8"==c?d=8:"9"==c?d=9:"10"==c&&(d=10);c=a.getField("OPERATOR");Entry.hw.setDigitalPortValue(d,"on"==c?255:0);return a.callReturn()};
+"block_icon/hardware_03.png","*"));this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)}};Entry.block.dplay_select_led=function(b,a){var c=a.getField("PORT"),d=7;"7"==c?d=7:"8"==c?d=8:"9"==c?d=9:"10"==c&&(d=10);c="on"==a.getField("OPERATOR")?255:0;Entry.hw.setDigitalPortValue(d,c);return a.callReturn()};
 Blockly.Blocks.dplay_get_switch_status={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField("\ub514\uc9c0\ud138 ");this.appendDummyInput().appendField(new Blockly.FieldDropdown([["2","2"],["4","4"]]),"PORT");this.appendDummyInput().appendField(Lang.Blocks.dplay_num_pin_2).appendField(new Blockly.FieldDropdown([[Lang.Blocks.dplay_string_5,"ON"],[Lang.Blocks.dplay_string_6,"OFF"]]),"STATUS").appendField(" ");this.setInputsInline(!0);this.setOutput(!0,"Boolean")}};
 Entry.block.dplay_get_switch_status=function(b,a){var c=a.getField("PORT"),d=2;"2"==c?d=2:"4"==c&&(d=4);return"OFF"==a.getField("STATUS")?1==Entry.hw.getDigitalPortValue(d)?1:0:0==Entry.hw.getDigitalPortValue(d)?1:0};
 Blockly.Blocks.dplay_get_light_status={init:function(){this.setColour("#00979D");this.appendDummyInput().appendField(Lang.Blocks.dplay_light).appendField(new Blockly.FieldDropdown([[Lang.Blocks.dplay_string_3,"BRIGHT"],[Lang.Blocks.dplay_string_4,"DARK"]]),"STATUS").appendField(" ");this.setInputsInline(!0);this.setOutput(!0,"Boolean")}};
@@ -231,7 +231,7 @@ Entry.block.quotient_and_mod=function(b,a){var c=a.getNumberValue("LEFTHAND",a),
 Blockly.Blocks.choose_project_timer_action={init:function(){this.setColour(calcBlockColor);this.appendDummyInput().appendField(Lang.Blocks.CALC_choose_project_timer_action_1,calcFontColor).appendField(new Blockly.FieldDropdown([[Lang.Blocks.CALC_choose_project_timer_action_sub_1,"START"],[Lang.Blocks.CALC_choose_project_timer_action_sub_2,"STOP"],[Lang.Blocks.CALC_choose_project_timer_action_sub_3,"RESET"]],null,!0,calcArrowColor),"ACTION").appendField(Lang.Blocks.CALC_choose_project_timer_action_2,
 calcFontColor).appendField(new Blockly.FieldIcon(Entry.mediaFilePath+"block_icon/calc_01.png","*"));this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)},whenAdd:function(){Entry.engine&&Entry.engine.showProjectTimer()},whenRemove:function(b){Entry.engine&&Entry.engine.hideProjectTimer(b)}};
 Entry.block.choose_project_timer_action=function(b,a){var c=a.getField("ACTION"),d=Entry.engine,e=d.projectTimer;"START"==c?e.isInit?e.isInit&&e.isPaused&&(e.pauseStart&&(e.pausedTime+=(new Date).getTime()-e.pauseStart),delete e.pauseStart,e.isPaused=!1):d.startProjectTimer():"STOP"==c?e.isInit&&!e.isPaused&&(e.isPaused=!0,e.pauseStart=(new Date).getTime()):"RESET"==c&&e.isInit&&(e.setValue(0),e.start=(new Date).getTime(),e.pausedTime=0,delete e.pauseStart);return a.callReturn()};Blockly.Blocks.wait_second={init:function(){this.setColour("#498deb");this.appendDummyInput().appendField(Lang.Blocks.FLOW_wait_second_1);this.appendValueInput("SECOND").setCheck(["Number","String",null]);this.appendDummyInput().appendField(Lang.Blocks.FLOW_wait_second_2).appendField(new Blockly.FieldIcon(Entry.mediaFilePath+"block_icon/flow_03.png","*"));this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)}};
-Entry.block.wait_second=function(b,a){if(a.isStart){if(1==a.timeFlag)return a;delete a.timeFlag;delete a.isStart;Entry.engine.isContinue=!1;return a.callReturn()}a.isStart=!0;a.timeFlag=1;var c=a.getNumberValue("SECOND",a);setTimeout(function(){a.timeFlag=0},60/(Entry.FPS||60)*c*1E3);return a};
+Entry.block.wait_second=function(b,a){if(a.isStart){if(1==a.timeFlag)return a;delete a.timeFlag;delete a.isStart;Entry.engine.isContinue=!1;return a.callReturn()}a.isStart=!0;a.timeFlag=1;var c=a.getNumberValue("SECOND",a),c=60/(Entry.FPS||60)*c*1E3;setTimeout(function(){a.timeFlag=0},c);return a};
 Blockly.Blocks.repeat_basic={init:function(){this.setColour("#498deb");this.appendDummyInput().appendField(Lang.Blocks.FLOW_repeat_basic_1);this.appendValueInput("VALUE").setCheck(["Number","String"]);this.appendDummyInput().appendField(Lang.Blocks.FLOW_repeat_basic_2).appendField(new Blockly.FieldIcon(Entry.mediaFilePath+"block_icon/flow_03.png","*"));this.appendStatementInput("DO");this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)}};
 Entry.block.repeat_basic=function(b,a){var c;if(!a.isLooped){a.isLooped=!0;c=a.getNumberValue("VALUE",a);if(0>c)throw Error(Lang.Blocks.FLOW_repeat_basic_errorMsg);a.iterCount=Math.floor(c)}if(0==a.iterCount||0>a.iterCount)return delete a.isLooped,delete a.iterCount,a.callReturn();a.iterCount--;return a.getStatement("DO",a)};
 Blockly.Blocks.repeat_inf={init:function(){this.setColour("#498deb");this.appendDummyInput().appendField(Lang.Blocks.FLOW_repeat_inf).appendField(new Blockly.FieldIcon(Entry.mediaFilePath+"block_icon/flow_03.png","*"));this.appendStatementInput("DO");this.setInputsInline(!0);this.setPreviousStatement(!0);this.setNextStatement(!0)}};Entry.block.repeat_inf=function(b,a){a.isLooped=!0;return a.getStatement("DO")};
@@ -801,9 +801,9 @@ this.parent.objectType&&(b.colour=this.getColour(),b.text=this.getText(),b.textA
 Entry.EntityObject.prototype.removeBrush=function(){Entry.stage.selectedObjectContainer.removeChild(this.shape);this.shape=this.brush=null};
 Entry.EntityObject.prototype.updateBG=function(){if(this.bgObject){this.bgObject.graphics.clear();var b=this.getWidth(),a=this.getHeight();this.bgObject.graphics.setStrokeStyle(1).beginStroke().beginFill(this.getBGColour()).drawRect(-b/2,-a/2,b,a);if(this.getLineBreak())this.bgObject.x=0;else switch(this.getTextAlign()){case Entry.TEXT_ALIGN_LEFT:this.bgObject.x=b/2;break;case Entry.TEXT_ALIGN_CENTER:this.bgObject.x=0;break;case Entry.TEXT_ALIGN_RIGHT:this.bgObject.x=-b/2}}};
 Entry.EntityObject.prototype.alignTextBox=function(){if("textBox"==this.type){var b=this.textObject;if(this.lineBreak){var a=b.getMeasuredLineHeight();b.y=a/2-this.getHeight()/2;switch(this.textAlign){case Entry.TEXT_ALIGN_CENTER:b.x=0;break;case Entry.TEXT_ALIGN_LEFT:b.x=-this.getWidth()/2;break;case Entry.TEXT_ALIGN_RIGHT:b.x=this.getWidth()/2}b.maxHeight=this.getHeight()}else b.x=0,b.y=0}};Entry.EntityObject.prototype.syncDialogVisible=function(){this.dialog&&(this.dialog.object.visible=this.visible)};Entry.Helper=function(){this.visible=!1};p=Entry.Helper.prototype;
-p.generateView=function(b,a){if(!this.parentView_){this.parentView_=b;this.blockHelpData=EntryStatic.blockInfo;var c=Entry.createElement("div","entryBlockHelperWorkspace");this.view=c;Entry.isForLecture&&c.addClass("lecture");this.parentView_.appendChild(c);if(!Entry.isForLecture){var d=Entry.createElement("div","entryBlockHelperHeaderWorkspace");d.innerHTML=Lang.Helper.Block_info;c.appendChild(d)}d=Entry.createElement("div","entryBlockHelperContentWorkspace");d.addClass("entryBlockHelperIntro");
-Entry.isForLecture&&d.addClass("lecture");c.appendChild(d);this.blockHelperContent_=d;this.blockHelperView_=c;c=Entry.createElement("div","entryBlockHelperBlockWorkspace");this.blockHelperContent_.appendChild(c);d=Entry.createElement("div","entryBlockHelperDescriptionWorkspace");this.blockHelperContent_.appendChild(d);d.innerHTML=Lang.Helper.Block_click_msg;this.blockHelperDescription_=d;this._renderView=new Entry.RenderView($(c),"LEFT");this.code=new Entry.Code([]);this._renderView.changeCode(this.code);
-this.first=!0}};p.bindWorkspace=function(b){b&&(this._blockViewObserver&&this._blockViewObserver.destroy(),this.workspace=b,this._blockViewObserver=b.observe(this,"_updateSelectedBlock",["selectedBlockView"]))};p._updateSelectedBlock=function(){var b=this.workspace.selectedBlockView;if(b&&this.visible&&b!=this._blockView){var a=b.block.type;this._blockView=b;this.renderBlock(a)}};
+p.generateView=function(b,a){if(!this.parentView_){this.parentView_=b;this.blockHelpData=EntryStatic.blockInfo;var c=Entry.createElement("div","entryBlockHelperWorkspace");this.view=c;Entry.isForLecture&&c.addClass("lecture");this.parentView_.appendChild(c);var d=Entry.createElement("div","entryBlockHelperContentWorkspace");d.addClass("entryBlockHelperIntro");Entry.isForLecture&&d.addClass("lecture");c.appendChild(d);this.blockHelperContent_=d;this.blockHelperView_=c;c=Entry.createElement("div","entryBlockHelperBlockWorkspace");
+this.blockHelperContent_.appendChild(c);d=Entry.createElement("div","entryBlockHelperDescriptionWorkspace");this.blockHelperContent_.appendChild(d);d.innerHTML=Lang.Helper.Block_click_msg;this.blockHelperDescription_=d;this._renderView=new Entry.RenderView($(c),"LEFT");this.code=new Entry.Code([]);this._renderView.changeCode(this.code);this.first=!0}};
+p.bindWorkspace=function(b){b&&(this._blockViewObserver&&this._blockViewObserver.destroy(),this.workspace=b,this._blockViewObserver=b.observe(this,"_updateSelectedBlock",["selectedBlockView"]))};p._updateSelectedBlock=function(){var b=this.workspace.selectedBlockView;if(b&&this.visible&&b!=this._blockView){var a=b.block.type;this._blockView=b;this.renderBlock(a)}};
 p.renderBlock=function(b){var a=Lang.Helper[b];if(b&&this.visible&&a&&!Entry.block[b].isPrimitive){this.first&&(this.blockHelperContent_.removeClass("entryBlockHelperIntro"),this.first=!1);this.code.clear();var c=Entry.block[b].def,c=c||{type:b};this.code.createThread([c]);this.code.board.align();this.code.board.resize();var c=this.code.getThreads()[0].getFirstBlock().view,d=c.svgGroup.getBBox();b=d.width;d=d.height;c=c.getSkeleton().box(c).offsetX;isNaN(c)&&(c=0);this.blockHelperDescription_.innerHTML=
 a;this._renderView.align();$(this.blockHelperDescription_).css({top:d+30});this._renderView.svgDom.css({"margin-left":-(b/2)-20-c})}};p.getView=function(){return this.view};p.resize=function(){};Entry.Activity=function(b,a){this.name=b;this.timestamp=new Date;var c=[];if(void 0!==a)for(var d=0,e=a.length;d<e;d++){var f=a[d];c.push({key:f[0],value:f[1]})}this.data=c};Entry.ActivityReporter=function(){this._activities=[]};(function(b){b.add=function(a){if(!(a instanceof Entry.Activity))return console.error("Activity must be an instanceof Entry.MazeActivity");this._activities.push(a)};b.clear=function(){this._activities=[]};b.get=function(){return this._activities}})(Entry.ActivityReporter.prototype);Entry.State=function(b,a,c,d){this.caller=a;this.func=c;3<arguments.length&&(this.params=Array.prototype.slice.call(arguments).slice(3));this.message=b;this.time=Entry.getUpTime();this.isPass=Entry.Command[b]?Entry.Command[b].isPass:!1};Entry.State.prototype.generateMessage=function(){};Entry.StateManager=function(){this.undoStack_=[];this.redoStack_=[];this.isIgnore=this.isRestore=!1;Entry.addEventListener("cancelLastCommand",function(b){Entry.stateManager.cancelLastCommand()});Entry.addEventListener("run",function(b){Entry.stateManager.updateView()});Entry.addEventListener("stop",function(b){Entry.stateManager.updateView()});Entry.addEventListener("saveWorkspace",function(b){Entry.stateManager.addStamp()});Entry.addEventListener("undo",function(b){Entry.stateManager.undo()});Entry.addEventListener("redo",
 function(b){Entry.stateManager.redo()})};Entry.StateManager.prototype.generateView=function(b,a){};
@@ -1424,8 +1424,8 @@ skeleton:"basic_string_field",statements:[],params:[{type:"Dropdown",options:[["
 ["7","7"],["8","8"],["9","9"],["10","10"],["11","11"],["12","12"],["13","13"]],value:"0",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW}],events:{},def:{params:[null]},paramsKeyMap:{PORT:0},func:function(b,a){return a.getStringField("PORT")}},arduino_get_pwm_port_number:{color:"#00979D",skeleton:"basic_string_field",statements:[],params:[{type:"Dropdown",options:[["3","3"],["5","5"],["6","6"],["9","9"],["10","10"],["11","11"]],value:"3",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW}],events:{},
 def:{params:[null]},paramsKeyMap:{PORT:0},func:function(b,a){return a.getStringField("PORT")}},arduino_get_number_sensor_value:{color:"#00979D",fontColor:"#fff",skeleton:"basic_string_field",statements:[],params:[{type:"Block",accept:"string"}],events:{},def:{params:[{type:"arduino_get_sensor_number"}],type:"arduino_get_number_sensor_value"},paramsKeyMap:{VALUE:0},"class":"arduino_value",isNotFor:["arduino"],func:function(b,a){var c=a.getValue("VALUE",a);return Entry.hw.getAnalogPortValue(c[1])}},
 arduino_get_digital_value:{color:"#00979D",fontColor:"#fff",skeleton:"basic_boolean_field",statements:[],params:[{type:"Block",accept:"string"}],events:{},def:{params:[{type:"arduino_get_port_number"}],type:"arduino_get_digital_value"},paramsKeyMap:{VALUE:0},"class":"arduino_value",isNotFor:["arduino"],func:function(b,a){var c=a.getNumberValue("VALUE",a);return Entry.hw.getDigitalPortValue(c)}},arduino_toggle_led:{color:"#00979D",skeleton:"basic",statements:[],params:[{type:"Block",accept:"string"},
-{type:"Dropdown",options:[[Lang.Blocks.ARDUINO_on,"on"],[Lang.Blocks.ARDUINO_off,"off"]],value:"on",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW},{type:"Indicator",img:"block_icon/hardware_03.png",size:12}],events:{},def:{params:[{type:"arduino_get_port_number"},null,null],type:"arduino_toggle_led"},paramsKeyMap:{VALUE:0,OPERATOR:1},"class":"arduino_set",isNotFor:["arduino"],func:function(b,a){var c=a.getNumberValue("VALUE"),d=a.getField("OPERATOR");Entry.hw.setDigitalPortValue(c,"on"==d?255:
-0);return a.callReturn()}},arduino_toggle_pwm:{color:"#00979D",skeleton:"basic",statements:[],params:[{type:"Block",accept:"string"},{type:"Block",accept:"string"},{type:"Indicator",img:"block_icon/hardware_03.png",size:12}],events:{},def:{params:[{type:"arduino_get_pwm_port_number"},{type:"arduino_text",params:["255"]},null],type:"arduino_toggle_pwm"},paramsKeyMap:{PORT:0,VALUE:1},"class":"arduino_set",isNotFor:["arduino"],func:function(b,a){var c=a.getNumberValue("PORT"),d=a.getNumberValue("VALUE"),
+{type:"Dropdown",options:[[Lang.Blocks.ARDUINO_on,"on"],[Lang.Blocks.ARDUINO_off,"off"]],value:"on",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW},{type:"Indicator",img:"block_icon/hardware_03.png",size:12}],events:{},def:{params:[{type:"arduino_get_port_number"},null,null],type:"arduino_toggle_led"},paramsKeyMap:{VALUE:0,OPERATOR:1},"class":"arduino_set",isNotFor:["arduino"],func:function(b,a){var c=a.getNumberValue("VALUE"),d="on"==a.getField("OPERATOR")?255:0;Entry.hw.setDigitalPortValue(c,
+d);return a.callReturn()}},arduino_toggle_pwm:{color:"#00979D",skeleton:"basic",statements:[],params:[{type:"Block",accept:"string"},{type:"Block",accept:"string"},{type:"Indicator",img:"block_icon/hardware_03.png",size:12}],events:{},def:{params:[{type:"arduino_get_pwm_port_number"},{type:"arduino_text",params:["255"]},null],type:"arduino_toggle_pwm"},paramsKeyMap:{PORT:0,VALUE:1},"class":"arduino_set",isNotFor:["arduino"],func:function(b,a){var c=a.getNumberValue("PORT"),d=a.getNumberValue("VALUE"),
 d=Math.round(d),d=Math.max(d,0),d=Math.min(d,255);Entry.hw.setDigitalPortValue(c,d);return a.callReturn()}},arduino_convert_scale:{color:"#00979D",fontColor:"#fff",skeleton:"basic_string_field",statements:[],params:[{type:"Block",accept:"string"},{type:"Block",accept:"string"},{type:"Block",accept:"string"},{type:"Block",accept:"string"},{type:"Block",accept:"string"}],events:{},def:{params:[{type:"arduino_get_number_sensor_value",params:[{type:"arduino_get_sensor_number",id:"bl5e"}]},{type:"number",
 params:["0"]},{type:"number",params:["1023"]},{type:"number",params:["0"]},{type:"number",params:["100"]}],type:"arduino_convert_scale"},paramsKeyMap:{VALUE1:0,VALUE2:1,VALUE3:2,VALUE4:3,VALUE5:4},"class":"arduino",isNotFor:["arduino"],func:function(b,a){var c=a.getNumberValue("VALUE1",a),d=a.getNumberValue("VALUE2",a),e=a.getNumberValue("VALUE3",a),f=a.getNumberValue("VALUE4",a),g=a.getNumberValue("VALUE5",a);if(d>e)var h=d,d=e,e=h;f>g&&(h=f,f=g,g=h);c-=d;c*=(g-f)/(e-d);c+=f;c=Math.min(g,c);c=Math.max(f,
 c);return Math.round(c)}},sensorBoard_get_named_sensor_value:{color:"#00979D",fontColor:"#fff",skeleton:"basic_string_field",statements:[],params:[{type:"Dropdown",options:[["\uc18c\ub9ac","0"],["\ube5b \uac10\uc9c0","1"],["\uc2ac\ub77c\uc774\ub354","2"],["\uc628\ub3c4","3"]],value:"0",fontSize:11}],events:{},def:{params:[null],type:"sensorBoard_get_named_sensor_value"},paramsKeyMap:{PORT:0},"class":"sensorBoard",isNotFor:["sensorBoard"],func:function(b,a){return Entry.hw.getAnalogPortValue(a.getField("PORT",
@@ -1517,7 +1517,7 @@ null,null],type:"quotient_and_mod"},paramsKeyMap:{LEFTHAND:1,RIGHTHAND:3,OPERATO
 "START"],[Lang.Blocks.CALC_choose_project_timer_action_sub_2,"STOP"],[Lang.Blocks.CALC_choose_project_timer_action_sub_3,"RESET"]],value:"START",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_CALC},{type:"Text",text:Lang.Blocks.CALC_choose_project_timer_action_2,color:"#3D3D3D"},{type:"Indicator",img:"block_icon/calc_01.png",size:12}],events:{viewAdd:[function(){Entry.engine&&Entry.engine.showProjectTimer()}],dataDestroy:[function(b){Entry.engine&&Entry.engine.hideProjectTimer(b)}]},def:{params:[null,
 "START",null,null],type:"choose_project_timer_action"},paramsKeyMap:{ACTION:1},"class":"calc_timer",isNotFor:[],func:function(b,a){var c=a.getField("ACTION"),d=Entry.engine,e=d.projectTimer;"START"==c?e.isInit?e.isInit&&e.isPaused&&(e.pauseStart&&(e.pausedTime+=(new Date).getTime()-e.pauseStart),delete e.pauseStart,e.isPaused=!1):d.startProjectTimer():"STOP"==c?e.isInit&&!e.isPaused&&(e.isPaused=!0,e.pauseStart=(new Date).getTime()):"RESET"==c&&e.isInit&&(e.setValue(0),e.start=(new Date).getTime(),
 e.pausedTime=0,delete e.pauseStart);return a.callReturn()}},wait_second:{color:"#498deb",skeleton:"basic",statements:[],params:[{type:"Block",accept:"string"},{type:"Indicator",img:"block_icon/flow_03.png",size:12}],events:{},def:{params:[{type:"number",params:["2"]},null],type:"wait_second"},paramsKeyMap:{SECOND:0},"class":"delay",isNotFor:[],func:function(b,a){if(a.isStart){if(1==a.timeFlag)return a;delete a.timeFlag;delete a.isStart;Entry.engine.isContinue=!1;return a.callReturn()}a.isStart=!0;
-a.timeFlag=1;var c=a.getNumberValue("SECOND",a);setTimeout(function(){a.timeFlag=0},60/(Entry.FPS||60)*c*1E3);return a}},repeat_basic:{color:"#498deb",skeleton:"basic_loop",statements:[{accept:"basic"}],params:[{type:"Block",accept:"string"},{type:"Indicator",img:"block_icon/flow_03.png",size:12}],events:{},def:{params:[{type:"number",params:["10"]},null],type:"repeat_basic"},paramsKeyMap:{VALUE:0},statementsKeyMap:{DO:0},"class":"repeat",isNotFor:[],func:function(b,a){var c;if(!a.isLooped){a.isLooped=
+a.timeFlag=1;var c=a.getNumberValue("SECOND",a),c=60/(Entry.FPS||60)*c*1E3;setTimeout(function(){a.timeFlag=0},c);return a}},repeat_basic:{color:"#498deb",skeleton:"basic_loop",statements:[{accept:"basic"}],params:[{type:"Block",accept:"string"},{type:"Indicator",img:"block_icon/flow_03.png",size:12}],events:{},def:{params:[{type:"number",params:["10"]},null],type:"repeat_basic"},paramsKeyMap:{VALUE:0},statementsKeyMap:{DO:0},"class":"repeat",isNotFor:[],func:function(b,a){var c;if(!a.isLooped){a.isLooped=
 !0;c=a.getNumberValue("VALUE",a);if(0>c)throw Error(Lang.Blocks.FLOW_repeat_basic_errorMsg);a.iterCount=Math.floor(c)}if(0==a.iterCount||0>a.iterCount)return delete a.isLooped,delete a.iterCount,a.callReturn();a.iterCount--;return a.getStatement("DO",a)}},repeat_inf:{color:"#498deb",skeleton:"basic_loop",statements:[{accept:"basic"}],params:[{type:"Indicator",img:"block_icon/flow_03.png",size:12}],events:{},def:{params:[null],type:"repeat_inf"},statementsKeyMap:{DO:0},"class":"repeat",isNotFor:[],
 func:function(b,a){a.isLooped=!0;return a.getStatement("DO")}},stop_repeat:{color:"#498deb",skeleton:"basic",statements:[],params:[{type:"Indicator",img:"block_icon/flow_03.png",size:12}],events:{},def:{params:[null],type:"stop_repeat"},"class":"repeat",isNotFor:[],func:function(b,a){return this.executor.breakLoop()}},wait_until_true:{color:"#498deb",skeleton:"basic",statements:[],params:[{type:"Block",accept:"boolean"},{type:"Indicator",img:"block_icon/flow_03.png",size:12}],events:{},def:{params:[{type:"True"},
 null],type:"wait_until_true"},paramsKeyMap:{BOOL:0},"class":"wait",isNotFor:[],func:function(b,a){return a.getBooleanValue("BOOL",a)?a.callReturn():a}},_if:{color:"#498deb",skeleton:"basic_loop",statements:[{accept:"basic"}],params:[{type:"Block",accept:"boolean"},{type:"Indicator",img:"block_icon/flow_03.png",size:12}],events:{},def:{params:[{type:"True"},null],type:"_if"},paramsKeyMap:{BOOL:0},statementsKeyMap:{STACK:0},"class":"condition",isNotFor:[],func:function(b,a){return a.isCondition?(delete a.isCondition,
@@ -1841,7 +1841,7 @@ arrowColor:EntryStatic.ARROW_COLOR_HW}],events:{},def:{params:[null,null],type:"
 params:[{type:"Dropdown",options:[["2","2"],["4","4"]],value:"2",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW},{type:"Dropdown",options:[["\uc67c\ucabd","LEFT"],["\uc624\ub978\ucabd","LIGHT"]],value:"LEFT",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW}],events:{},def:{params:[null,null],type:"dplay_get_tilt"},paramsKeyMap:{PORT:0,STATUS:1},"class":"dplay_get",isNotFor:["dplay"],func:function(b,a){var c=a.getField("PORT"),d=2;"2"==c?d=2:"4"==c&&(d=4);return"LIGHT"==a.getField("STATUS")?1==
 Entry.hw.getDigitalPortValue(d)?1:0:0==Entry.hw.getDigitalPortValue(d)?1:0}},dplay_toggle_led:{parent:"arduino_toggle_led",isNotFor:["dplay"],def:{params:[{type:"arduino_get_port_number"},null,null],type:"dplay_toggle_led"},"class":"dplay_set"},dplay_toggle_pwm:{parent:"arduino_toggle_pwm",isNotFor:["dplay"],def:{params:[{type:"arduino_get_pwm_port_number"},{type:"arduino_text",params:["255"]},null],type:"dplay_toggle_pwm"},"class":"dplay_set"},dplay_select_led:{color:"#00979D",fontColor:"#FFF",skeleton:"basic",
 statements:[],template:"\ub514\uc9c0\ud138 %1 LED \uc0c1\ud0dc\ub97c %2 %3",params:[{type:"Dropdown",options:[["7","7"],["8","8"],["9","9"],["10","10"],["12","12"],["13","13"]],value:"7",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW},{type:"Dropdown",options:[["\ucf1c\uae30","ON"],["\ub044\uae30","OFF"]],value:"ON",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW},{type:"Indicator",img:"block_icon/hardware_03.png",size:12}],events:{},def:{params:[null,null,null],type:"dplay_select_led"},paramsKeyMap:{PORT:0,
-OPERATOR:1},"class":"dplay_set",isNotFor:["dplay"],func:function(b,a){var c=a.getField("PORT"),d=7;"7"==c?d=7:"8"==c?d=8:"9"==c?d=9:"10"==c?d=10:"12"==c?d=12:"13"==c&&(d=13);c=a.getField("OPERATOR");Entry.hw.setDigitalPortValue(d,"ON"==c?255:0);return a.callReturn()}},dplay_DCmotor:{color:"#00979D",fontColor:"#FFF",skeleton:"basic",statements:[],template:"%1  DC\ubaa8\ud130 \uc0c1\ud0dc\ub97c %2 %3",params:[{type:"Dropdown",options:[["\uc67c\ucabd","1"],["\uc624\ub978\ucabd","2"],["\uc591\ucabd",
+OPERATOR:1},"class":"dplay_set",isNotFor:["dplay"],func:function(b,a){var c=a.getField("PORT"),d=7;"7"==c?d=7:"8"==c?d=8:"9"==c?d=9:"10"==c?d=10:"12"==c?d=12:"13"==c&&(d=13);c="ON"==a.getField("OPERATOR")?255:0;Entry.hw.setDigitalPortValue(d,c);return a.callReturn()}},dplay_DCmotor:{color:"#00979D",fontColor:"#FFF",skeleton:"basic",statements:[],template:"%1  DC\ubaa8\ud130 \uc0c1\ud0dc\ub97c %2 %3",params:[{type:"Dropdown",options:[["\uc67c\ucabd","1"],["\uc624\ub978\ucabd","2"],["\uc591\ucabd",
 "3"]],value:"1",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW},{type:"Dropdown",options:[["\uc815\ubc29\ud5a5","FRONT"],["\uc5ed\ubc29\ud5a5","REAR"],["\uc815\uc9c0","OFF"]],value:"FRONT",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW},{type:"Indicator",img:"block_icon/hardware_03.png",size:12}],events:{},def:{params:[null,null,null],type:"dplay_DCmotor"},paramsKeyMap:{PORT:0,OPERATOR:1},"class":"dplay_set",isNotFor:["dplay"],func:function(b,a){var c=a.getField("PORT"),d=0,e=0,f=0,g=0;"1"==
 c?(d=3,e=5):"2"==c?(d=6,e=11):"3"==c&&(d=3,e=5,f=11,g=6);var c=Entry.dplay.vel_value,h=a.getField("OPERATOR"),k=0,l=0;"FRONT"==h?(k=c,l=0):"REAR"==h?(k=0,l=c):"OFF"==h&&(l=k=0);Entry.hw.setDigitalPortValue(d,l);Entry.hw.setDigitalPortValue(e,k);Entry.hw.setDigitalPortValue(f,l);Entry.hw.setDigitalPortValue(g,k);return a.callReturn()}},dplay_DCmotor_speed:{color:"#00979D",fontColor:"#FFF",skeleton:"basic",statements:[],template:"%1  DC\ubaa8\ud130 \uc18d\ub3c4\ub97c %2(\uc73c)\ub85c \uc815\ud558\uae30 %3",
 params:[{type:"Dropdown",options:[["\uc67c\ucabd","1"],["\uc624\ub978\ucabd","2"],["\uc591\ucabd","3"]],value:"1",fontSize:11,arrowColor:EntryStatic.ARROW_COLOR_HW},{type:"Block",accept:"string"},{type:"Indicator",img:"block_icon/hardware_03.png",size:12}],events:{},def:{params:[null,{type:"text",params:["100"]},null],type:"dplay_DCmotor_speed"},paramsKeyMap:{PORT:0,VALUE:1},"class":"dplay_set",isNotFor:["dplay"],func:function(b,a){var c=a.getField("PORT"),d=0,e=0,f=0,g=0;"1"==c?(d=3,e=5):"2"==c?
@@ -1875,14 +1875,15 @@ b.getMode())&&Entry.GlobalSvg.addControl(a);else if(g.code&&(b=e.block,d=b.getTh
 this._boardBlockView;if(a){this.workspace.getBoard();this._boardBlockView=null;var b=Entry.GlobalSvg.left,d=Entry.GlobalSvg.width/2,a=a.getBoard().offset().left;return b<a-d}}};b.getCode=function(a){return this._code};b.setSelectedBlock=function(a){var b=this.selectedBlockView;b&&b.removeSelected();a instanceof Entry.BlockView?a.addSelected():a=null;this.set({selectedBlockView:a})};b.hide=function(){this.view.addClass("entryRemove")};b.show=function(){this.view.removeClass("entryRemove")};b.renderText=
 function(){for(var a=this.code.getThreads(),b=0;b<a.length;b++)a[b].view.renderText()};b.renderBlock=function(){for(var a=this.code.getThreads(),b=0;b<a.length;b++)a[b].view.renderBlock()};b._createSplitter=function(a){a=this.svgBlockGroup.elem("line",{x1:20,y1:a,x2:this._svgWidth-20,y2:a,stroke:"#b5b5b5"});this._splitters.push(a)};b.updateSplitters=function(a){a=void 0===a?0:a;var b=this._svgWidth-20,d;this._splitters.forEach(function(e){d=parseFloat(e.getAttribute("y1"))+a;e.attr({x2:b,y1:d,y2:d})})};
 b._clearSplitters=function(){for(var a=this._splitters,b=a.length-1;0<=b;b--)a[b].remove(),a.pop()};b.setWidth=function(){this._svgWidth=this.blockMenuContainer.width();this.updateSplitters()};b.setMenu=function(){var a=this._categoryCodes,b=this._categoryElems,d;for(d in a){for(var e=a[d],e=e instanceof Entry.Code?e.getThreads():e,f=e.length,g=0;g<e.length;g++){var h=e[g],h=h instanceof Entry.Thread?h.getFirstBlock().type:h[0].type;this.checkBanClass(Entry.block[h])&&f--}0===f?b[d].addClass("entryRemove"):
-b[d].removeClass("entryRemove")}};b.getCategoryCodes=function(a){a=this._convertSelector(a);var b=this._categoryCodes[a];b||(b=[]);b instanceof Entry.Code||(b=this._categoryCodes[a]=new Entry.Code(b));return b};b._convertSelector=function(a){if(isNaN(a))return a;a=Number(a);for(var b=this._categories,d=this._categoryElems,e=0;e<b.length;e++){var f=b[e];if(!d[f].hasClass("entryRemove")&&0===a--)return f}};b.selectMenu=function(a,b){var d=this._convertSelector(a);if(d){"variable"==d&&Entry.playground.checkVariables();
-"arduino"==d&&this._generateHwCode();var e=this._categoryElems[d],f=this._selectedCategoryView,g=!1,h=this.workspace.board,k=h.view;f&&f.removeClass("entrySelectedCategory");e!=f||b?f||(this.visible||(g=!0,k.addClass("foldOut"),Entry.playground.showTabs()),k.removeClass("folding"),this.visible=!0):(k.addClass("folding"),this._selectedCategoryView=null,e.removeClass("entrySelectedCategory"),Entry.playground.hideTabs(),g=!0,this.visible=!1);g&&Entry.bindAnimationCallbackOnce(k,function(){h.scroller.resizeScrollBar.call(h.scroller);
-k.removeClass("foldOut");Entry.windowResized.notify()});this.visible&&(f=this._categoryCodes[d],this._selectedCategoryView=e,e.addClass("entrySelectedCategory"),f.constructor!==Entry.Code&&(f=this._categoryCodes[d]=new Entry.Code(f)),this.changeCode(f));this.lastSelector=d}};b._generateCategoryCodes=function(a){this._categoryCodes={};for(var b=0;b<a.length;b++){var d=a[b],e=[];d.blocks.forEach(function(a){var b=Entry.block[a];if(b&&b.def)if(b.defs)for(a=0;a<b.defs.length;a++)e.push([b.defs[a]]);else e.push([b.def]);
-else e.push([{type:a}])});d=d.category;this._categories.push(d);this._categoryCodes[d]=e}};b.banClass=function(a,b){0>this._bannedClass.indexOf(a)&&this._bannedClass.push(a);this.align(b)};b.unbanClass=function(a,b){var d=this._bannedClass.indexOf(a);-1<d&&this._bannedClass.splice(d,1);this.align(b)};b.checkBanClass=function(a){if(a){a=a.isNotFor;for(var b in this._bannedClass)if(a&&-1<a.indexOf(this._bannedClass[b]))return!0;return!1}};b._addControl=function(a){var b=this;a.on("wheel",function(){b._mouseWheel.apply(b,
-arguments)})};b._mouseWheel=function(a){a=a.originalEvent;a.preventDefault();var b=Entry.disposeEvent;b&&b.notify(a);this._scroller.scroll(-a.wheelDeltaY||a.deltaY/3)};b.dominate=function(a){this.svgBlockGroup.appendChild(a.view.svgGroup)};b.reDraw=function(){this.selectMenu(this.lastSelector,!0)};b._handleDragBlock=function(){this._boardBlockView=null;this._scroller&&this._scroller.setOpacity(0)};b._captureKeyEvent=function(a){var b=a.keyCode,d=Entry.type;a.ctrlKey&&"workspace"==d&&48<b&&58>b&&(a.preventDefault(),
-this.selectMenu(b-49))};b.setPatternRectFill=function(a){this.patternRect.attr({fill:a})};b._clearCategory=function(){this._selectedCategoryView=null;this._categories=[];var a=this._categoryElems,b;for(b in a)a[b].remove();this._categoryElems={};a=this._categoryCodes;for(b in a){var d=a[b];d.constructor==Entry.Code&&d.clear()}this._categoryCodes=null};b.setCategoryData=function(a){this._clearCategory();this._categoryData=a;this._generateCategoryView(a);this._generateCategoryCodes(a)};b._generateCategoryView=
-function(a){if(a)for(var b=this,d=0;d<a.length;d++){var e=a[d].category;(function(a,d){a.text(Lang.Blocks[d.toUpperCase()]);b._categoryElems[d]=a;a.bindOnClick(function(a){b.selectMenu(d)})})(Entry.Dom("li",{id:"entryCategory"+e,class:"entryCategoryElementWorkspace",parent:this._categoryCol}),e)}};b.updateOffset=function(){this._offset=this.svgDom.offset()};b.offset=function(){(!this._offset||0===this._offset.top&&0===this._offset.left)&&this.updateOffset();return this._offset};b._generateHwCode=
-function(){var a=this._categoryCodes.arduino;a instanceof Entry.Code&&a.clear();for(var b=this._categoryData,d,a=b.length-1;0<=a;a--)if("arduino"===b[a].category){d=b[a].blocks;break}b=[];for(a=0;a<d.length;a++){var e=d[a],f=Entry.block[e];if(!this.checkBanClass(f))if(f&&f.def)if(f.defs)for(a=0;a<f.defs.length;a++)b.push([f.defs[a]]);else b.push([f.def]);else b.push([{type:e}])}this._categoryCodes.arduino=b}})(Entry.BlockMenu.prototype);Entry.BlockMenuScroller=function(b){var a=this;this.board=b;this.board.changeEvent.attach(this,this._reset);this.svgGroup=null;this.vRatio=this.vY=this.vWidth=this.hX=0;this._visible=!0;this._opacity=-1;this.mouseHandler=function(){a.onMouseDown.apply(a,arguments)};this.createScrollBar();this.setOpacity(0);this._addControl();Entry.windowResized&&Entry.windowResized.attach(this,this.resizeScrollBar)};Entry.BlockMenuScroller.RADIUS=7;
+b[d].removeClass("entryRemove")}};b.getCategoryCodes=function(a){a=this._convertSelector(a);var b=this._categoryCodes[a];b||(this._generateCategoryElement(a),b=[]);b instanceof Entry.Code||(b=this._categoryCodes[a]=new Entry.Code(b));return b};b._convertSelector=function(a){if(isNaN(a))return a;a=Number(a);for(var b=this._categories,d=this._categoryElems,e=0;e<b.length;e++){var f=b[e];if(!d[f].hasClass("entryRemove")&&0===a--)return f}};b.selectMenu=function(a,b){var d=this._convertSelector(a);if(d){"variable"==
+d&&Entry.playground.checkVariables();"arduino"==d&&this._generateHwCode();var e=this._categoryElems[d],f=this._selectedCategoryView,g=!1,h=this.workspace.board,k=h.view;f&&f.removeClass("entrySelectedCategory");e!=f||b?f||(this.visible||(g=!0,k.addClass("foldOut"),Entry.playground.showTabs()),k.removeClass("folding"),this.visible=!0):(k.addClass("folding"),this._selectedCategoryView=null,e.removeClass("entrySelectedCategory"),Entry.playground.hideTabs(),g=!0,this.visible=!1);g&&Entry.bindAnimationCallbackOnce(k,
+function(){h.scroller.resizeScrollBar.call(h.scroller);k.removeClass("foldOut");Entry.windowResized.notify()});this.visible&&(f=this._categoryCodes[d],this._selectedCategoryView=e,e.addClass("entrySelectedCategory"),f.constructor!==Entry.Code&&(f=this._categoryCodes[d]=new Entry.Code(f)),this.changeCode(f));this.lastSelector=d}};b._generateCategoryCodes=function(a){this._categoryCodes={};for(var b=0;b<a.length;b++){var d=a[b],e=[];d.blocks.forEach(function(a){var b=Entry.block[a];if(b&&b.def)if(b.defs)for(a=
+0;a<b.defs.length;a++)e.push([b.defs[a]]);else e.push([b.def]);else e.push([{type:a}])});d=d.category;this._categories.push(d);this._categoryCodes[d]=e}};b.banClass=function(a,b){0>this._bannedClass.indexOf(a)&&this._bannedClass.push(a);this.align(b)};b.unbanClass=function(a,b){var d=this._bannedClass.indexOf(a);-1<d&&this._bannedClass.splice(d,1);this.align(b)};b.checkBanClass=function(a){if(a){a=a.isNotFor;for(var b in this._bannedClass)if(a&&-1<a.indexOf(this._bannedClass[b]))return!0;return!1}};
+b._addControl=function(a){var b=this;a.on("wheel",function(){b._mouseWheel.apply(b,arguments)})};b._mouseWheel=function(a){a=a.originalEvent;a.preventDefault();var b=Entry.disposeEvent;b&&b.notify(a);this._scroller.scroll(-a.wheelDeltaY||a.deltaY/3)};b.dominate=function(a){this.svgBlockGroup.appendChild(a.view.svgGroup)};b.reDraw=function(){this.selectMenu(this.lastSelector,!0)};b._handleDragBlock=function(){this._boardBlockView=null;this._scroller&&this._scroller.setOpacity(0)};b._captureKeyEvent=
+function(a){var b=a.keyCode,d=Entry.type;a.ctrlKey&&"workspace"==d&&48<b&&58>b&&(a.preventDefault(),this.selectMenu(b-49))};b.setPatternRectFill=function(a){this.patternRect.attr({fill:a})};b._clearCategory=function(){this._selectedCategoryView=null;this._categories=[];var a=this._categoryElems,b;for(b in a)a[b].remove();this._categoryElems={};a=this._categoryCodes;for(b in a){var d=a[b];d.constructor==Entry.Code&&d.clear()}this._categoryCodes=null};b.setCategoryData=function(a){this._clearCategory();
+this._categoryData=a;this._generateCategoryView(a);this._generateCategoryCodes(a)};b._generateCategoryView=function(a){if(a)for(var b=0;b<a.length;b++)this._generateCategoryElement(a[b].category)};b._generateCategoryElement=function(a){var b=this;(function(a,e){a.text(Lang.Blocks[e.toUpperCase()]);b._categoryElems[e]=a;a.bindOnClick(function(a){b.selectMenu(e)})})(Entry.Dom("li",{id:"entryCategory"+a,class:"entryCategoryElementWorkspace",parent:this._categoryCol}),a)};b.updateOffset=function(){this._offset=
+this.svgDom.offset()};b.offset=function(){(!this._offset||0===this._offset.top&&0===this._offset.left)&&this.updateOffset();return this._offset};b._generateHwCode=function(){var a=this._categoryCodes.arduino;a instanceof Entry.Code&&a.clear();for(var b=this._categoryData,d,a=b.length-1;0<=a;a--)if("arduino"===b[a].category){d=b[a].blocks;break}b=[];for(a=0;a<d.length;a++){var e=d[a],f=Entry.block[e];if(!this.checkBanClass(f))if(f&&f.def)if(f.defs)for(a=0;a<f.defs.length;a++)b.push([f.defs[a]]);else b.push([f.def]);
+else b.push([{type:e}])}this._categoryCodes.arduino=b}})(Entry.BlockMenu.prototype);Entry.BlockMenuScroller=function(b){var a=this;this.board=b;this.board.changeEvent.attach(this,this._reset);this.svgGroup=null;this.vRatio=this.vY=this.vWidth=this.hX=0;this._visible=!0;this._opacity=-1;this.mouseHandler=function(){a.onMouseDown.apply(a,arguments)};this.createScrollBar();this.setOpacity(0);this._addControl();Entry.windowResized&&Entry.windowResized.attach(this,this.resizeScrollBar)};Entry.BlockMenuScroller.RADIUS=7;
 (function(b){b.createScrollBar=function(){this.svgGroup=this.board.svgGroup.elem("g",{class:"boardScrollbar"});this.vScrollbar=this.svgGroup.elem("rect",{rx:4,ry:4});this.resizeScrollBar()};b.resizeScrollBar=function(){this._updateRatio();if(this._visible&&0!==this.vRatio){var a=this.board.blockMenuContainer;this.vScrollbar.attr({width:9,height:a.height()/this.vRatio,x:a.width()-9})}};b.updateScrollBar=function(a){this.vY+=a;this.vScrollbar.attr({y:this.vY})};b.scroll=function(a){this.isVisible()&&
 (a=this._adjustValue(a)-this.vY,0!==a&&(this.board.code.moveBy(0,-a*this.vRatio),this.updateScrollBar(a)))};b._adjustValue=function(a){var b=this.board.svgDom.height(),b=b-b/this.vRatio;a=this.vY+a;a=Math.max(0,a);return a=Math.min(b,a)};b.setVisible=function(a){a!=this.isVisible()&&(this._visible=a,this.svgGroup.attr({display:!0===a?"block":"none"}))};b.setOpacity=function(a){this._opacity!=a&&(this.vScrollbar.attr({opacity:a}),this._opacity=a)};b.isVisible=function(){return this._visible};b._updateRatio=
 function(){var a=this.board,b=a.svgBlockGroup.getBoundingClientRect(),d=a.blockMenuContainer.height(),a=a.offset();this.vRatio=b=(b.height+(b.top-a.top)+10)/d;1>=b?this.setVisible(!1):this.setVisible(!0)};b._reset=function(){this.vY=0;this.vScrollbar.attr({y:this.vY});this.resizeScrollBar()};b.onMouseDown=function(a){function b(a){a.stopPropagation&&a.stopPropagation();a.preventDefault&&a.preventDefault();a=a.originalEvent&&a.originalEvent.touches?a.originalEvent.touches[0]:a;var c=e.dragInstance;
diff --git a/src/helper.js b/src/helper.js
index f8f53c4805..35a143ff4f 100644
--- a/src/helper.js
+++ b/src/helper.js
@@ -24,12 +24,12 @@ p.generateView = function(parentView, option) {
     if (Entry.isForLecture)
         blockHelperView.addClass('lecture');
     helper.parentView_.appendChild(blockHelperView);
-    if (!Entry.isForLecture) {
-        var blockHelperHeader = Entry.createElement('div',
-                                'entryBlockHelperHeaderWorkspace');
-        blockHelperHeader.innerHTML = Lang.Helper.Block_info;
-        blockHelperView.appendChild(blockHelperHeader);
-    }
+    // if (!Entry.isForLecture) {
+    //     var blockHelperHeader = Entry.createElement('div',
+    //                             'entryBlockHelperHeaderWorkspace');
+    //     blockHelperHeader.innerHTML = Lang.Helper.Block_info;
+    //     blockHelperView.appendChild(blockHelperHeader);
+    // }
     var blockHelperContent = Entry.createElement('div',
                             'entryBlockHelperContentWorkspace');
     blockHelperContent.addClass('entryBlockHelperIntro');
diff --git a/src/workspace/block_menu.js b/src/workspace/block_menu.js
index 8bba1db223..e31d80c570 100644
--- a/src/workspace/block_menu.js
+++ b/src/workspace/block_menu.js
@@ -380,8 +380,10 @@ Entry.BlockMenu = function(dom, align, categoryData, scroll) {
     p.getCategoryCodes = function(selector) {
         var name = this._convertSelector(selector);
         var code = this._categoryCodes[name];
-        if (!code)
+        if (!code) {
+            this._generateCategoryElement(name);
             code = [];
+        }
         if (!(code instanceof Entry.Code))
             code = this._categoryCodes[name] = new Entry.Code(code);
         return code;
@@ -588,26 +590,30 @@ Entry.BlockMenu = function(dom, align, categoryData, scroll) {
 
     p._generateCategoryView = function(data) {
         if (!data) return;
-        var that = this;
 
         for (var i=0; i<data.length; i++) {
             var name = data[i].category;
-            var element = Entry.Dom('li', {
-                id: 'entryCategory' + name,
-                class: 'entryCategoryElementWorkspace',
-                parent: this._categoryCol
-            });
-
-            (function(elem, name){
-                elem.text(Lang.Blocks[name.toUpperCase()]);
-                that._categoryElems[name] = elem;
-                elem.bindOnClick(function(e) {
-                    that.selectMenu(name);
-                });
-            })(element, name);
+            this._generateCategoryElement(name);
         }
     };
 
+    p._generateCategoryElement = function(name) {
+        var that = this;
+        var element = Entry.Dom('li', {
+            id: 'entryCategory' + name,
+            class: 'entryCategoryElementWorkspace',
+            parent: this._categoryCol
+        });
+
+        (function(elem, name){
+            elem.text(Lang.Blocks[name.toUpperCase()]);
+            that._categoryElems[name] = elem;
+            elem.bindOnClick(function(e) {
+                that.selectMenu(name);
+            });
+        })(element, name);
+    };
+
     p.updateOffset = function () {
         this._offset = this.svgDom.offset();
     };