If you want to spend more time on this I think one fun idea would be an infinite bouncing DVD logo. Just sync the location of the logo every time it bounces so

If you want to spend more time on this I think one fun idea would be an infinite bouncing DVD logo. Just sync the location of the logo every time it bounces so all devices have a consistent view and then the individual screens can compute whether and how much of the logo to show and at which location.