diff --git a/snake.py b/snake.py
index 537316e..75f956e 100644
--- a/snake.py
+++ b/snake.py
@@ -1,4 +1,5 @@
 import pygame
+import random
 from pygame import locals
 
 # 初始化pygame，为使用硬件做准备
@@ -22,7 +23,8 @@ position = [(180, 90), (180, 120), (210, 120), (x, y)]
 
 setheading = "right"
 snake_head = right
-
+apple_x=360
+apple_y=300
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -52,6 +54,10 @@ while True:
     else:
         y += 30
     position.append((x, y))
+    if x == apple_x and y == apple_y:
+        apple_x=random.randint(0,660)
+        apple_y=random.randint(0,480)
+
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -65,4 +71,4 @@ while True:
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(3)