操作一只小猫在一个大花园里走来走去，配的音乐效果不错。
下面是部分代码预览：

"""本程序操作一只小猫在一个绿色的园林中行走,其实小猫的坐标是不变的,变的是地图坐标"""

import time
import pygame
from pygame.locals import *

width,height = 480,360
screen = pygame.display.set_mode((width,height))
pygame.display.set_caption("大地图相对运动scratch小猫过桥 www.lixingqiu.com")

pygame.mixer.init()
pygame.mixer.music.load("Grandia OST - Delightful Adventure.wav")
pygame.mixer.music.play(-1,0)

ground = pygame.image.load("地图.png")
size = ground.get_size()
ground = pygame.transform.scale(ground,(size[0] * 3,size[1] * 3)) # 放大3倍地图

cat = Actor(images_right,images_left)
cat.rect.center = width//2,height//2
running = True
cat.start_time = time.time()
clock = pygame.time.Clock()
while running:
    for event in pygame.event.get():
        if event.type == QUIT:running = False
    ground_rect.move_ip(ground_dx,ground_dy) 
    cat.update()
    screen.fill((102,226,60))
    screen.blit(ground,ground_rect)
    screen.blit(cat.image,cat.rect)
    
    pygame.display.update()
    clock.tick(60)
    
pygame.quit()
            

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