I'm working on a roulette table on a server that I'm playing on, inspired by MagmaMusen's video on YouTube:
It uses a minecart with an armor stand inside it. The minecart is not visible, but the top of the iron helmet on the armor stand is visible like a moving square on top of the diferent-coloured carpets above the minecart. The minecart goes in a circle (about 3x3 blocks big) on powered rails, until a player flicks a lever and stops the minecart by turning off the rails.
The main flaw of this is that the moment the roulette stops isn't random. This could cause some arguing between the players. How can I avoid this problem? Is it possible to have a button that will stop the rails at a random moment instead of the lever?
It would also be nice if you could avoid using too complicated redstone circuits and command blocks.
Note: You can check out MagmaMusen's video "How to make a Working Roulette Table" if you didn't get the way it works from my explanation.