You will need:

This build is fairly straightforward, and the code can be put together pretty quickly.

Below is a simple wiring diagram I sketched out after doing a little refresher on the components. I then sat the pieces on top, for dramatic effect.

Given the simplicity of the circuit, I simple soldered the wires together.

Although the original code took some tweaking, it worked pretty much as is. You can grab it here:

Often, I've spent weeks or months on preparing the final look and feel. This isn't one of those jobs. We're just going to use an entire stick of hot glue and attach it to some thin plywood, then use a drywall screw to mount it.