save project

snake.py

@@ -73,7 +73,9 @@ while True:
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body, position[i])
-
+if x<0 or x>630 or y<0 or y>450:
+        exit()
+        
     # 将果实画上去
     screen.blit(food, (apple_x, apple_y))
     info="score"+str(score)
@@ -82,6 +84,4 @@ while True:
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
-    if x<0 or x>630 or y<0 or y>450:
-        exit()
-        
+