diff --git a/Chapters/BasicsOnExecution/figures/interpreter_activation-ascii.txt b/Chapters/BasicsOnExecution/figures/interpreter_activation-ascii.txt
index ab95539..1661c87 100644
--- a/Chapters/BasicsOnExecution/figures/interpreter_activation-ascii.txt
+++ b/Chapters/BasicsOnExecution/figures/interpreter_activation-ascii.txt
@@ -1,7 +1,7 @@
  
-instructionPointer   -----> <01> pushRcvr 1 - push the value of the receiver's second instance variable (corner )  onto the stack
-                            <7E> send 'x' - send the unary message x	
-                            <00> pushRcvr 0 - push the value of the receiver's first instance variable (origin ) onto the stack
-                            <7E> send 'x' - send the unary message x
-                            <61> send '-' - send the binary message -
-                            <5C> returnTop
\ No newline at end of file
+IP  --> <01> pushRcvr 1 - push the receiver's 2nd instance variable (corner )
+        <7E> send 'x' - send the message x	
+        <00> pushRcvr 0 - push  the receiver's 1st instance variable (origin ) 
+        <7E> send 'x' - send the message x
+        <61> send '-' - send the message -
+        <5C> returnTop
\ No newline at end of file
diff --git a/Chapters/BasicsOnExecution/figures/interpreter_activation.pdf b/Chapters/BasicsOnExecution/figures/interpreter_activation.pdf
index 12a271b..527e793 100644
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diff --git a/Chapters/BasicsOnExecution/figures/width_0.pdf b/Chapters/BasicsOnExecution/figures/width_0.pdf
index 3db29c0..6539e3f 100644
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