"Mirror" or "lense" for Beacon Beams

A lot of times people want beacon beams as decoration or a marker but its hard getting a lot of beacons, so if you had an ajustable mirror block or a "lense" that could point different ways  you could redirect the beam to bounce off a few mirrors to show multiple beams. Maybe they would have limited degrees of turning freedom and times reflected but it could be used for so much! Seems like a fair item since you're just in it for the light show and not the added effects of the beacon. you could even send coded messages using reflected beacon beams. Theyve been the same a long time would be cool to make it useful in a different way.