This arduino controlled coaster was created to help me stay on top of my water consumption at work. Each LED is lit blue for exactly 1 hour before turning green, letting me know that I should have consumed one 8oz glass by he time the next led is lit. By the end of the work day I should have finished eight 8oz glasses. If you go over 8 hours, a new color is introduced to help in keeping track. The timer was sped up for the sake of the video. I had a co-worker that loved the design but doesn't drink much water. However, she takes medication so I changed the timer to suit her needs. Now whenever the led is lit she knows to take her meds. How will you use the coaster?Print the two files, I printed these on a Replicator 2 at 10% infill on the lowest setting. Install an Arduino Mini Pro, wire Ground, VCC and pin 6 to a string of 8 WS2812 LEDs. Add a battery or wire a USB cable using only the ground and 5v wires. https://www.youtube.com/watch?v=VEBhgpEKNW0&feature=youtu.be