Experimental ring lampshade

Untested.
CAUTION: USE WITH LED OR CCFL LIGHTS ONLY. USING INCANDESCENT LIGHTS CAN MELT THE PIECES.
Print 6 outer pieces, two set1 and one set2. Push-fit together and use glue if necessary.
Printing in different colors may have interesting results :-)
The scad file is a mess, so don't expect to see fancy stuff there.