A custom LED clock - but spirals

Making a clock that doesn't look like any other clock out there. Laser cut plexiglass, programmable LEDs and more. I look at it every day, but it is a few projects down on the list for the time being.
I've got the code working to make it look like a radar scope, and it looks neat. Still trying to map all the LEDs to show things sweep from left to right, and being in a spiral is a bit more complicated.