save project

my_tree.py

@@ -22,6 +22,6 @@ pen.left(90)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
-tree(100)
+tree(50)
 
 
 turtle.done()
 turtle.done()