save project

diy2.py

 import turtle
+screen=turtle.Screen()
+screen.bgcolor("black")
 pen=turtle.Pen()
 pen.speed(10000)
-for i in range(1,300):
+co=["red","yellow","cyan","purple"]
+for i in range(1,1000000000):
     pen.forward(i)
-    i=i+1
+    pen.pencolor(co[i%4])
     pen.right(91)
 pen.hideturtle()
 turtle.done()
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