diff --git a/my_tree.py b/my_tree.py
index 823dbfc..3947d72 100644
--- a/my_tree.py
+++ b/my_tree.py
@@ -11,5 +11,13 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
+pen.forward(100)
+pen.right(30)
+pen.forward(100)
+pen.forward(-100)
+pen.left(60)
+pen.forward(100)
+pen.forward(-100)
+pen.right(30)
+pen.forward(-100)
 turtle.done()