NTU countdown clock

We've got a joke with a buddy of mine at work - he once claimed that some task would only take 15 minutes (an unrealistically short time for pretty much any software development task), that we started joking that all of his tasks would take some multiple of an NTU - Nick Time Unit. A month or two later, I was looking for something fun to make that would let me mess around with neopixels again. So I built this NTU countdown clock. The button on the left adds NTUs, and the button on the right clears the counter. As the time counts down the color will progressively move towards red, and when the timer expires all of the neopixels will blink red to alert the user. I love those illuminated arcade buttons on the top - they make a nice solid click when you push them.

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