diff --git a/snake.py b/snake.py
index 537316e..a59ec53 100644
--- a/snake.py
+++ b/snake.py
@@ -1,5 +1,6 @@
 import pygame
 from pygame import locals
+import random
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -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=300
 setheading = "right"
 snake_head = right
 
@@ -41,6 +43,7 @@ while True:
             if event.key == locals.K_DOWN and setheading != "up":
                 setheading = 'down'
                 snake_head = down
+        
 
     # 设置贪吃蛇的头部坐标
     if setheading == "right":
@@ -52,7 +55,14 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+    if x==apple_x and y==apple_y:
+        num1 = random.randint(1,22)#x
+        num2 = random.randint(1,16)#y
+        apple_x=num1*30-30
+        apple_y=num2*30-30
+    else:
+        position.pop(0)
+    
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -62,7 +72,9 @@ 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(6)
+    
\ No newline at end of file