import pygame
import sys
from pygame import *
pygame.init

displaysurface = pygame.display.set_mode((400,600))

mySurface = pygame.Surface((50, 50))
mySurface2 = pygame.Surface((100, 50))

mySurface.fill ( (0, 255, 0))
mySurface2.fill ( (255, 0, 0))

while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit

    displaysurface.blit(mySurface, (50,50))
    displaysurface.blit(mySurface2, (50,150))
    pygame.display.update()