import pygame, time, random

pygame.init()
screen = pygame.display.set_mode([601,601])
screen.fill([0,0,0])
pygame.display.flip()

for j in range(0,1000):
    color1 = random.randint(0,255)
    color2 = random.randint(0,255)
    color3 = random.randint(0,255)
    left = random.randint(0,500)
    top = random.randint(0,500)
    width = random.randint(10,80)
    height = random.randint(10,80)
    pygame.draw.rect(screen, [color1,color2,color3], [left,top,width,height], 0)
    time.sleep(.01)
    pygame.display.flip()

raw_input("Press ENTER to close the graphics window")
pygame.quit()