save project

a.py

 import turtle
 pen=turtle.Pen()
-a=1
-for a in range (300):
+color=["red","green","orange","yellow"]
+for a in range (1,300):
+    pen.pencolor(color[a%4])
     pen.forward(a)
     pen.left(91)
-    a+=1
 pen.hideturtle()
 turtle.done()
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