I've wanted to make this clock for a few years now and finally got a round to it.
The 3d model has 3 parts, the ring, the connector pin, and the diffuser.  You'll need 3 of each and maybe an extra diffuser.
Parts were superglued together.  

This isn't a very polished model, the cutouts in the ring (for hanging) aren't centered in the segment.  There is no specific place to glue in the diffuser.  But it works.

Wired with a Pi Zero W and 60 lights per meter neopixel strip.  So, one meter.  Took several test prints to get the correct circumference right for 1 meter.

Code was a mashup of a couple of digital clocks, plus some original stuff.