save project

snake.py

@@ -61,14 +61,14 @@ while True:
     else:
         position.pop(0)
     # 将背景图画上去
+    if x<0 or x>630 or  y<0 or y>450
+    exit()
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])
     # 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, (360, 300))
     # 刷新画面
@@ -77,9 +77,3 @@ if x<0 or x>630 or  y<0 or y>450
 
     pygame.display.update()
     FPSCLOCK.tick(3)、
\ No newline at end of file
-
-
-
-
-    if x<0 or x>630 or  y<0 or y>450
-    exit()
\ No newline at end of file