save project

my_tree.py

@@ -17,10 +17,10 @@ pen.right(30)
 pen.forward(50)
 pen.forward(50)
 pen.up()
 pen.up()
 pen.forward(-50)
 pen.forward(-50)
-left(60)
-pen.left(90)
-pen.up()
-pen.backward(150)    # 后退
-pen.down()
+pen.left(60)
+pen.forward(50)
+pen.up() 
 pen.forward(50)
 pen.forward(50)
+pen.right(30)
+pen.forward(-100)
 turtle.done()
 turtle.done()