Some time ago I stumbled upon this article about using a smart bulb to keep a healthy breathing rhythm: <a href="https://asim.ihsan.io/healthy-breathing-with-a-smart-bulb/" rel="nofollow">https://asim.ihsan.io/healthy-breathing-with-a-smart-bulb/</a><p>But I needed something simpler that I could throw on a second screen while working. So I built myself Breather! Maybe it will help some of you as well. :)