http://barkengmad.com/rise-and-shine-led-clock/
http://sourceforge.net/projects/riseandshineledclock/
http://hackaday.com/2015/11/21/the-easiest-infinity-mirror-build/
http://hackaday.com/2014/07/29/infinity-mirror-clock-theres-a-time-joke-there-somewhere/