import pygame


WIDTH = 1000
HEIGHT = 1000


def draw_background_image(screen, filename):
    background = pygame.image.load(filename)
    screen.blit(background, (0, 0))

pygame.init()

screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Тест Pygame")

draw_background_image(screen, "assets/bg1k.png")

pygame.display.flip()

while pygame.event.wait().type != pygame.QUIT:
    ...

pygame.quit()