import pygame, sys
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((1000,800))

surface = pygame.Surface((400,400))
surface.fill((255,255,255))


while True :
    events = pygame.event.get()
    for event in events :
        if event.type == pygame.QUIT :
            pygame.quit()
            sys.exit()
    screen.blit(surface, (200,200))
    pygame.display.update()