save project

snake.py

 import pygame
 from pygame import locals
-
+import random
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 
@@ -19,7 +19,7 @@ down = pygame.image.load('down.png')        # 头 朝下
 
 x, y = 240, 120
 position = [(180, 90), (180, 120), (210, 120), (x, y)]
-
+a,s=360,300
 setheading = "right"
 snake_head = right
 
@@ -52,7 +52,7 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+    
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -60,9 +60,18 @@ while True:
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body, position[i])
-
+        if (x,y)==position[i]:
+            exit()
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (a,s))
+    if x==a and y==s:
+        a=random.randint(0,21)*30
+        s=random.randint(0,15)*30
+    else:
+        position.pop(0)
+    if x<0 or y<0 or x>660 or y>480:
+        exit()
+
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(5)
\ No newline at end of file