save project

my_tree.py

@@ -25,17 +25,5 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
-def tree(n):
-    if n >= 50:
-        pen.forward(n)
-        pen.right(30)
-        tree(n-50)
-        pen.left(60)
-        tree(n-50)
-        pen.right(30)
-        pen up()
-        pen.backward(n)
-        pen.down()
-
-tree(100)
+tree(60)
 turtle.done()