auto save

1.py

+import turtle
+bg=turtle.Screen()
+colors=["black","yellow","black","green"]
+bg.bgcolor("black")
+pen=turtle.Pen()
+for i in range(1,1000):
+    pen.forward(i)
+    pen.pencolor(colors[i%4])
+    pen.right(91)
+pen.hideturtle()
+turtle.done()
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