如何让屏幕随着pygame中的角色移动？

import pygame
pygame.init()

screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))

character = pygame.image.load("character.png")
character_rect = character.get_rect()
character_rect.centerx = screen_width // 2
character_rect.centery = screen_height // 2

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

    # 检测按键状态
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        character_rect.x -= 5
    if keys[pygame.K_RIGHT]:
        character_rect.x += 5
    if keys[pygame.K_UP]:
        character_rect.y -= 5
    if keys[pygame.K_DOWN]:
        character_rect.y += 5

    # 更新屏幕
    screen.fill((255, 255, 255))
    screen.blit(character, character_rect)
    pygame.display.flip()

pygame.quit()