I'm not kidding, that's the extent of the build. They simply connect that display to a computer over HDMI. The only hacking here is browser-based JS for clock animations.

I found that the surf browser was efficient enough to run fine on my Raspberry Pi Zero W. YMMV with animations and such, but it's much better than any chromium alternative in my experience.

Why do they need to be ...white :)

Oh i see the cables now and cant unsee them.

I guess next step is to 3D print a back case mount that encloses the RPi and plugs into a wall socket for power.