auto save

my_tree.py

@@ -8,8 +8,9 @@ def tree(n):  # 画树枝
         tree(n-10)
         pen.left(60)
         tree(n-10)
-        pen.right(20)
-        
+        pen.right(30)
+        pen.backward(n)
+        pen.down()
 
 pen = turtle.Turtle()
 pen.color('sienna')
@@ -23,6 +24,6 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
-tree(60)
+tree(50)
 turtle.done()