auto save

my_tree.py

 import turtle
 import random
 
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 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 pen.pensize(3)
-pen.speed(30)
+pen.speed(90)
 # 移动到起点
 pen.left(90)
 pen.up()