auto save

1.py

+import turtle
+pen=turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
+color=['green','red','orange','yellow']
+for i in range(1,150):
+    pen.pencolor(color[i%4])
+    pen.forward(i*2)
+    pen.right(91)
+pen.hideturtle()
+turtle.done()
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