save project

diy1.py

 import turtle
 pen = turtle.Pen()
-distance=1
+screen = turtle.Screen()
+screen.bgcolor("black")
+colors=["red","yellow","green","orange"]
 for i in range(1,300):
-    pen.forward(distance)
-    distance+=1
+    pen.forward(i)
+    pen.pencolor(colors[i%4])
     pen.right(91)
-pen.hideturtle()
 turtle.done()
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