diff --git a/snake.py b/snake.py
index 537316e..5c2bbd2 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
@@ -19,7 +20,8 @@ down = pygame.image.load('down.png')        # 头 朝下
 
 x, y = 240, 120
 position = [(180, 90), (180, 120), (210, 120), (x, y)]
-
+apple_x = 360
+apple_y = 360
 setheading = "right"
 snake_head = right
 
@@ -51,6 +53,12 @@ while True:
         y -= 30
     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.append((x, y))
     position.pop(0)
     # 将背景图画上去
@@ -62,7 +70,7 @@ while True:
         screen.blit(body, position[i])
 
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (apple_x, apple_y))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(3) 
\ No newline at end of file