save project

my_tree.py

@@ -11,5 +11,17 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+pen.forward(150)
+pen.left(30)
+pen.forward(75)
+pen.up()
+pen.backward(75)
+pen.right(60)
+pen.down()
+pen.forward(75)
+pen.up()
+pen.backward(75)
+pen.left(30)
+pen.backward(150)
 
 turtle.done()