save project

my_tree.py

@@ -12,9 +12,9 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 pen.forward(100)
-pen.left(30)
+pen.right()(30)
 pen.forward(50)
 pen.backward(50)
-pen.right(60)
+pen.left()(60)
 pen.forward(50)
 turtle.done()