如何在pygame中移动角色而不制作多张图片

import pygame
pygame.init()

screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("Moving Character")

character_image = pygame.image.load("character.png")  # 替换为角色图片的文件路径
character_rect = character_image.get_rect()

character_rect.centerx = screen_width / 2
character_rect.centery = screen_height / 2

move_speed = 5

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 获取键盘按下的键
    keys = pygame.key.get_pressed()

    # 根据按下的键来移动角色
    if keys[pygame.K_LEFT]:
        character_rect.x -= move_speed
    if keys[pygame.K_RIGHT]:
        character_rect.x += move_speed
    if keys[pygame.K_UP]:
        character_rect.y -= move_speed
    if keys[pygame.K_DOWN]:
        character_rect.y += move_speed

    # 清空屏幕并绘制角色
    screen.fill((0, 0, 0))  # 使用黑色清空屏幕
    screen.blit(character_image, character_rect)

    # 更新屏幕显示
    pygame.display.flip()

# 退出游戏循环后，关闭Pygame
pygame.quit()