keys_pressed = set()
done = False
last = 0
while not done:
# delay until 1/60th of second
while time.time() - last < 1 / 60:
pass
last = time.time()
# pump events
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
if event.type == pygame.KEYDOWN:
keys_pressed.add(event.key)
if event.type == pygame.KEYUP:
keys_pressed.remove(event.key)
# update game state
if pygame.K_ESCAPE in keys_pressed:
done = True
# update and draw
surface.fill((0, 0, 0))
state = state.update(keys_pressed, surface)
pygame.display.update()
pygame.mixer.music.stop()
pygame.quit()
sys.exit()
