import pygame
import random

WIDTH = 500
HEIGHT = 700
FPS = 60

WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)

pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
font = pygame.font.Font(None, 36)
running = True
pygame.time.set_timer(pygame.USEREVENT, 100)

offset = 0

while running:
    screen.fill(WHITE)
    for event in pygame.event.get():
        
     if event.type == pygame.QUIT:
            running = False
     if event.type == pygame.USEREVENT:
         offset = offset + 10
         
    for it_1 in range(0,500,50):
     img = font.render("Hello world", True, BLUE)
     screen.blit(img, (it_1%50+offset,it_1))
     
    
    
    pygame.display.update()

pygame.quit()