save project

snake.py

@@ -66,6 +66,10 @@ while True:
         score = score+10
         score = score+10
     else:
     else:
         position.pop(0)
         position.pop(0)
+
+    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
     screen.blit(snake_head, position[-1])
     screen.blit(snake_head, position[-1])