如何在pygame中逐个字母删除文本？(就像那些复古的RPG游戏一样)

import pygame
import sys

pygame.init()
width, height = 800, 600
screen = pygame.display.set_mode((width, height))

font = pygame.font.Font(None, 36)
text = "Hello, World!"
text_position = (width // 2, height // 2)

clock = pygame.time.Clock()
delete_mode = False

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

    screen.fill((0, 0, 0))  # 清空屏幕

    # 根据delete_mode的状态逐个字母渲染文本
    if delete_mode:
        for i in range(len(text)):
            rendered_text = font.render(text[:i], True, (255, 255, 255))
            screen.blit(rendered_text, text_position)
            pygame.display.flip()
            pygame.time.wait(100)  # 控制删除速度
    else:
        rendered_text = font.render(text, True, (255, 255, 255))
        screen.blit(rendered_text, text_position)

    pygame.display.flip()
    clock.tick(60)  # 控制帧率

for event in pygame.event.get():
    if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_SPACE:
            delete_mode = True