import pygame
import sys

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

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

mySurface1.fill( (0, 255, 0) )  #Green
mySurface2.fill( (255, 0, 0) )  #Red
mySurface3.fill( (0, 0, 255) )  #Blue

displaysurface.blit(mySurface, (50,50))