started implementing support for for loops

draw/Iinstruction.py

@@ -161,4 +161,7 @@ class while_instruction_back(while_instruction_front):
         for inst in self.child_instructions:
             res += '\t' +str(inst) + ";\n"
         res += f"{'}'}while({self.instruction_text});"
-        return res
+        return res
+
+class for_instruction(while_instruction_front):
+    pass