auto save

my_tree.py

 import turtle
 import turtle
-
-pen = turtle.Turtle()
-pen.color('sienna')
-# 画布大小
-w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
-
-# 移动到起点
-pen.left(90)
-pen.up()
-pen.backward(150)    # 后退
-pen.down()
-
-turtle.done()
+pen = t