diff --git a/roman-time.js b/roman-time.js
index f66353e..82659b7 100644
--- a/roman-time.js
+++ b/roman-time.js
@@ -4,8 +4,72 @@
  * @param {String} time – время в формате HH:MM (например, 09:05)
  * @returns {String} – время римскими цифрами (IX:V)
  */
+
+function translate(timeRoman) {
+    var romanNumber = ['N', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII',
+                       'VIII', 'IX', 'X', 'XX', 'XXX', 'XL', 'L', 'LX'];
+    var arabicNumber = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60];
+
+    var timeTranslate;
+    if (timeRoman <= 10) {
+        timeTranslate = romanNumber[arabicNumber.indexOf(timeRoman)];
+    } else {
+        timeTranslate = romanNumber[arabicNumber.indexOf(parseInt(timeRoman / 10) * 10)] +
+        romanNumber[arabicNumber.indexOf(timeRoman % 10)];
+    }
+
+    return timeTranslate;
+}
+
+function range(hour, minutes) {
+    if (hour > 23 || minutes >= 60 || hour < 0 || minutes < 0) {
+        return true;
+    }
+
+    return false;
+}
+
+function whole(arr) {
+    if (isNaN(arr[0]) || isNaN(arr[1]) || arr[0].indexOf('.') !== -1 ||
+        arr[1].indexOf('.') !== -1) {
+        return true;
+    }
+
+    return false;
+}
+
+function notNull(time) {
+    if (time === '' || time === ':' || typeof time !== 'string') {
+        return true;
+    }
+
+    return false;
+}
+
+function notNan(arr) {
+    if (arr[0] === ' ' || arr[1] === ' ' || arr[2] !== undefined) {
+        return true;
+    }
+
+    return false;
+}
+
 function romanTime(time) {
-    // Немного авторского кода и замечательной магии
+    if (time === '' || time.length !== 5) {
+        throw new TypeError('Неверное время', 'roman-time.js');
+    } else {
+        var arr = time.split(':');
+        var hour = parseInt(arr[0]);
+        var minutes = parseInt(arr[1]);
+    }
+
+
+    if (range(hour, minutes, arr) || whole(arr) || notNull(time) || notNan(arr)) {
+        throw new TypeError('Неверное время', 'roman-time.js');
+    } else {
+        time = translate(hour) + ':' + translate(minutes);
+    }
+
     return time;
 }