import pygame
from pygame.locals import *
from Box import Box

pygame.init()

screen = pygame.display.set_mode((680,460),0,32)
box1 = Box((255,0,0),(20,0), 200)
box2 = Box((255,255,0),(40,10), 100)
sprites = pygame.sprite.Group()
sprites.add(box1)
sprites.add(box2)

clock = pygame.time.Clock()

while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            exit()
    screen.fill((255,255,255))
    time_passed = clock.tick() /1000.0
    sprites.update(time_passed)
    sprites.draw(screen)
    pygame.display.update()