cut-throat pool markers

This is a tool for the billiards variation [Cut-throat](https://en.wikipedia.org/wiki/Cutthroat_(pool)). The rules allow players to claim a series of balls, one of which being either a multiple of three, or a multiple of five, depending on the number of players. This design is for a box which allows a player to indicate which ball they've claimed, and which is a storage box for the markers.