auto save

my_tree.py

@@ -12,4 +12,21 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
+pen.forward(100)
+pen.right(30)
+pen.forward(50)
+pen.back(50)
+pen.left(60)
+pen.forward(50)
+pen.back(50)
+pen.right(30)
+pen.up()
+pen.back(100)
+pen.down()
+
+
+
+
+
+
 turtle.done()