save project

snake.py

@@ -7,7 +7,7 @@ pygame.init()
 
 # 创建一个窗口
 FPS=pygame.time.Clock()
-screen=pygame.display.set_mode((800,600))
+screen=pygame.display.set_mode((660,480))
 background=pygame.image.load("bg.png")
 apple=pygame.image.load("apple.png")
 right=pygame.image.load("right.png")
@@ -66,7 +66,10 @@ while True:
         fenshu+=10
     else:
         position.pop(0)
-        
+    
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
+
     screen.blit(background,(0,0))
     screen.blit(apple,(apple_x,apple_y))
     screen.blit(tou, position[-1])