auto save

my_tree.py

@@ -13,11 +13,21 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 pen.forward(150)#画树干
-pen.right(30)
+
+pen.right(30)#右转树枝
 pen.forward(100)
+pen.up()
 pen.backward(100)
-pen.left(60)
+pen.down()
+
+pen.left(60)#左转的树枝
 pen.forward(100)
+pen.up()
+pen.backward(100)
+pen.down()
+
+pen.backward(150)
+
 
 
 turtle.done()