save project

snake.py

@@ -28,10 +28,12 @@ setheading = "right"
 snake_head = right
 
 while True:
+
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
+    
         if event.type == locals.KEYDOWN:
             if event.key == locals.K_RIGHT and setheading != "left":
                 setheading = 'right'
@@ -64,6 +66,9 @@ while True:
 
     else:
         position.pop(0)
+    
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
 
     
     # 将背景图画上去