One of my kids is an early riser. And for the last year, that meant we’re all early risers, regardless of if we’ve gotten enough sleep. So in an effort to have everyone well rested, I’ve put a small 3.5" TFT screen on an unused Raspberry Pi and coded up a simple HTML page, CSS stylesheet and javascript to display a fullscreen clock on boot. In addition, the background of the clock is green when it’s between 7am and 7pm, and red during the night.