save project

snake.py

@@ -65,6 +65,8 @@ while True:
     info="S"+str(ds)
     lp=my_foot.render(info,True,(0,0,0))
     screen.blit(lp,(600,0))
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
     # 刷新画面
     pygame.display.update()
     f.tick(3)