This is a parametric design made in openSCAD that generates objects with a hollow shaft in the middle where the usblinky is inserted.
Its a kind of 21st century lavalamp thing.

Check out the videos to see what it looks like.

usblinky is a small usbstick that displays a variety of colorful patterns.
usblinky can run in standalone mode or be programmed from a computer directly over usb using the Arduino for Digispark environment.

Links:
http://www.hackerspaceshop.com/blinky/usblinky.html
https://metalab.at/wiki/Usblinky
http://www.openscad.org/

Videos:
https://www.youtube.com/watch?v=iY2UvfaMfJs
https://www.youtube.com/watch?v=cYPhyNVSkh4

Print it with 0.1-0.2mm layer height from transparent material.
You might also use white filament, but it will swallow a lot of light.