for i in clear_next_frame:
        b = background.subsurface(i)
        screen.blit(b, i)
        for surface,position in static_blits.itervalues():
            if position.colliderect(i) and position != i:
                x = position.clip(i)
                y = x.move(-position.left,-position.top)
                b = surface.subsurface(y)
                screen.blit(b, x)