save project

my_tree.py

@@ -11,6 +11,7 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+
 pen.forward(100)
 pen.right(30)
 pen.forward(50)
@@ -19,9 +20,12 @@ pen.backward(50)
 pen.down()
 pen.left(60)
 pen.forward(50)
+pen.up()
+pen.backward(50)
 pen.down()
 pen.right(30)
 pen.up()
 pen.backward(100)
+pen.down()
 
 turtle.done()
\ No newline at end of file