import pygame, sys
from pygame.locals import *
import random

RanPos = random.randint(1,800)
RanPos2 = random.randint(1,600)

RanPos3 = random.randint(1,800)
RanPos4 = random.randint(1,600)

pygame.init()
screen = pygame.display.set_mode((800,600))
background = pygame.Surface((800,600))

surface = pygame.Surface((20,20))
surface.fill((255,255,255))

surface2 = pygame.Surface((20,40))
surface2.fill((255,255,255))

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


    screen.blit(surface, (RanPos,RanPos2))
    screen.blit(surface2, (RanPos3,RanPos4))
    pygame.display.update()