auto save

my_tree.py

@@ -13,3 +13,15 @@ pen.backward(150)    # 后退
 pen.down()
 
 turtle.done()
+turtle.pendown()
+turtle.forward(100)
+turtle.left(30)
+turtle.forward(50)
+turtle.penup()
+turtle.backward(50)
+turtle.pendown()
+turtle.right(60)
+turtle.forward(50)
+turtle.penup()
+turtle.backward(50)
+