save project

snake.py

@@ -16,7 +16,7 @@ food = pygame.image.load('apple.png')       # 食物 苹果
 body = pygame.image.load('body.png')        # 身体
 body = pygame.image.load('body.png')        # 身体
 left = pygame.image.load('left.png')        # 头 朝左
 left = pygame.image.load('left.png')        # 头 朝左
 up = pygame.image.load('up.png')            # 头 朝上
 up = pygame.image.load('up.png')            # 头 朝上
-down = pygame.image.load('down.png')        # 头 朝下
+down = pygame.image.load('down.png')
 myfont=pygame.font.Font("neuropol.ttf",20)
 myfont=pygame.font.Font("neuropol.ttf",20)
 score = 0
 score = 0
 x, y = 240, 120
 x, y = 240, 120
@@ -63,8 +63,12 @@ while True:
     
     
     position.append((x, y))
     position.append((x, y))
     # 将背景图画上去
     # 将背景图画上去
-    screen.blit(background, (0, 0))
+    
+    if x<0 or x>630 or y<0 or y>450:
+        print("defeat")
+        exit()
     # 将贪吃蛇的头画上去
     # 将贪吃蛇的头画上去
+    screen.blit(background, (0, 0))
     screen.blit(snake_head, position[-1])
     screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
     for i in range(len(position)-1):