If we hit this quadrangle board(see the attachment) with a small disc on one of its wall, at a certain point with a certain angle, it will hit the four wall many times. Can we determine at what angle and at what point, the small disc will hit on the wall after n hit on the wall. That is, can it have a formula? Also when a computer shows the result, does it calculate for each hit on the wall and then reach, where the final hit will be. Thanks.