save project

my_tree.py

@@ -11,5 +11,12 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
+pen.forward(100)
+pen.right(30)
+pen .forward(50)
+pen.penup()
+pen.forward(-50)
+pen.left(60)
+pen.pendown()
+pen.forward(50)
 turtle.done()