save project

snake.py

@@ -66,8 +66,7 @@ while True:
        score+=10
     else:
         position.pop(0)
-    if x<0 or x >630 or y<0 or y>450:
-        exit()
+    
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去