MOVING COLOR™glass tiles

These MOVING COLOR™glass tiles that appear black at room temperature and move through the color spectrum when temperature (warm water, radiant heat, etc) is applied. The moving color is dynamic to the temperature of the heating agent. Tile continually changes as the heat exposure changes. These photos that document possible iterations. They are backed with a limited one year warranty too.

What you can do is limited by your creativity… nice… maybe they can make a urinal version…

Extract from Moving Color