diff --git a/snake.py b/snake.py
index 537316e..c40c747 100644
--- a/snake.py
+++ b/snake.py
@@ -1,13 +1,12 @@
 import pygame
 from pygame import locals
-
+import random
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
-FPSCLOCK = pygame.time.Clock()  # pygame时钟，控制游戏速度（帧数）
-
+FPSCLOCK = pygame.time.Clock()  # pygame时钟，控制游戏速度
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')      # 头 朝右
@@ -19,10 +18,11 @@ 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=300
 setheading = "right"
 snake_head = right
-
+score=0
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -52,8 +52,15 @@ while True:
     else:
         y += 30
     position.append((x, y))
+    if x == apple_x and y == apple_y:
+        num1=random.randint(1,22)
+        num2=random.randint(1,16)
+        apple_x=30*num1-30
+        apple_y=30*num2-30
     position.pop(0)
     # 将背景图画上去
+    if x < 0 or x > 630 or y < 0 or y > 450:
+        exit()
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])
@@ -62,7 +69,10 @@ 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))
+    info="score:"+str(score)
+    text=my_font.render(info,Ture,(0,0,0))
+    scoreen.blit(text,(540,10))
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
\ No newline at end of file