awesome.py

_last_called = time.time()
def animate():
    global r
    global _last_called

    now = time.time()
    if now - _last_called > 2:  # 2 is in seconds
        # Remember when I was called last
        _last_called = now

        # Determine a new random position
        x = random.randint(0, width)
        y = random.randint(0, height)

        # pygame.Rect needs 'left', 'top', 'width', 'height'
        # The 100, and the 50 are borrowed from the Surface above
        r = pygame.Rect(x, y, 100, 50)