Python/Pygame使for循环中的文本不断移动

import pygame
from pygame.locals import *

pygame.init()

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

text_x = 0
text_y = 300
text_speed = 5

clock = pygame.time.Clock()

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

    # 移动文本
    text_x += text_speed

    # 清空屏幕
    screen.fill((255, 255, 255))

    # 绘制文本
    font = pygame.font.Font(None, 36)
    text = font.render("Moving Text", True, (0, 0, 0))
    screen.blit(text, (text_x, text_y))

    # 更新屏幕
    pygame.display.flip()

    # 控制帧率
    clock.tick(60)

# 退出游戏
pygame.quit()