save project

my_tree.py

@@ -11,5 +11,17 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+pen.forward(100)
+pen.left(30)
+pen.forward(50)
+pen.left(180)
+pen.forward(50)
+pen.left(120)
+pen.forward(50)
+pen.left(180)
+pen.forward(50)
+pen.left(30)
+pen.forward(100)
+pen.left(180)
 
 turtle.done()