save project

snake.py

 import pygame
 from pygame import locals
+import random
 FPSCLOCK=pygame.time.Clock()
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -50,9 +51,12 @@ while True:
         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)
+        num1=random.randint(1,22)
+        num2=random.randint(1,66)
+        apple_x=30*num1-30
+        apple_y=30*num2-30
+    else:
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去