auto save

diy1.py

+import turtle
+pen = turtle.Pen()
+screen.bgcolor("black")
+yanhaochen = ['red','orange','black','yellow']
+screen = turtle.Screen()
+for i in range(1,300):
+    pen.forward(yanhaochen[i%4])
+    pen.right(91)
+    pen.forward(i)
+tuple.hidetutle()
+tuple.done()
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