import pygame

pygame.init()

largeur = 600
hauteur = 400
windowSurface = pygame.display.set_mode((largeur, hauteur), 0,32)

WHITE = (255, 255, 255)

running = True
while running:

    pygame.draw.line(windowSurface, WHITE, (0,10), (600,10))

    pygame.display.update()

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

pygame.quit()