import pygame,sys,random,time
from pygame.color import THECOLORS
pygame.init()
screen = pygame.display.set_mode([640,480])
screen.fill([255,255,255])
for i in range(100):
    width = random.randint(0,250)
    height = random.randint(0,100)
    top = random.randint(0,400)
    left = random.randint(0,500)
    color_name = random.choice(THECOLORS.keys())
    color = THECOLORS[color_name]
    pygame.draw.rect(screen,color,[left,top,width,height],3)
    pygame.time.delay(80)
    pygame.display.flip()
while  True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()