When the mouse rolls over one of the boxes, the "box" instance plays the "movebox" labeled frame. Through the tween, the square slides to the right, disappears, and the reappears as it slides back into place.
In the event that you need more rows, you can continue with the "else if" statements and keep creating "n"s.
Kevin Ford is a part time web designer who is looking to make it a full time occupation. After being introduced to Flash, he has come to fully appreciate its powers of web design.