如何在pygame中显示2秒的文本

import pygame
import sys

pygame.init()

window_size = (800, 600)
window_title = "Display Text in Pygame"
window = pygame.display.set_mode(window_size)
pygame.display.set_caption(window_title)

text_content = "Hello, World!"
font_size = 36
font_color = (255, 255, 255)  # 白色
font = pygame.font.Font(None, font_size)
text = font.render(text_content, True, font_color)
text_rect = text.get_rect()
text_rect.center = (window_size[0] // 2, window_size[1] // 2)

window.fill((0, 0, 0))  # 清空窗口为黑色
window.blit(text, text_rect)
pygame.display.flip()  # 更新窗口显示

clock = pygame.time.Clock()
start_time = pygame.time.get_ticks()
duration = 2000  # 2秒

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    current_time = pygame.time.get_ticks()
    if current_time - start_time >= duration:
        pygame.quit()
        sys.exit()

    pygame.display.update()
    clock.tick(60)  # 设置帧率为60