auto save

diy1.py

+import turtle
+pen = turtle.Pen()
+screen = turtle.Screen()
+screen.bgcolor("blue")
+colors=["white","blue","violet","cyan"]
 distance=1
 pen.speed(1000)
 for i in range(1,300):
-    pen.pencolor(colors[i%4])
+    pen.pencolor(colors[i%7])
     pen.forward(i)
     pen.right(91)
-    distance=distance+1
-# 隐藏画笔，保存画布
 pen.hideturtle()
 turtle.done()
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