Spin Planes
Inspired by a Regolo54 piece:
http://regolo54.tumblr.com/post/125247017652
Messing around with dynamicized symmetry and design.
I decided I liked the spinning less than the intersecting, so I made this:
http://tube.geogebra.org/m/1444649
More GeoGebra at bit.ly/mh-ggb