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I built a website for box breathing: https://box-breathing.com

It is basically a timer for your breathing exercises, as the idea is that you inhale and exhale slowly, hold your breath in between, each step lasting 4 seconds.

I tried to make it as simple as possible, and to make it usable with old devices as well.

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I'd add a couple of guides to mark the limits of expansion/contraction.

Inhaling - https://i.imgur.com/t38mmax.png

Exhaling - https://i.imgur.com/ZZ4SFXd.png

If they gently fade-in when the movement starts, it shouldn't take away from the experience.

Thanks! I tried, but I have not yet found a way to make such guides unobtrusive. I will try out your suggestion. It is very motivating to see that people care about my little side project so much that they post a comment. So, thank you, made my day!

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