save project

snake.py

@@ -69,6 +69,7 @@ while True:
         position.pop(0)
         position.pop(0)
     # 将背景图画上去
     # 将背景图画上去
     if x < 0 or x > 630 or y < 0 or y > 450:
     if x < 0 or x > 630 or y < 0 or y > 450:
+        exit()
     
     
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     # 将贪吃蛇的头画上去