For the displays, [Becky] is using four Adafruit 7-Segment ... the LED displays at a regular interval. It’s nice to see so much attention and explanation given to the software side of a project ...

For the simplest of builds, 7-segment display modules usually get dug up from the parts bin. If you have a bunch of “smart” LED’s (WS2812 ... plain vanilla — an Arduino Nano clone ...