I posted to instructables.com

Build a 3D to 2D Projection Sculpture from PVC Pipe

http://www.instructables.com/id/Build-a-3D-to-2D-Projection-Sculpture-from-PVC-Pip/

Here's an eye-catching piece of outdoor sculpture you can build with minimal tools and time. As it moves in the wind, it projects a changing 2D "surface" from a 3D solid. Confuses "flatlanders" and passersby alike!

Bill of Materials

You'll need 12 equal-sized sections of PVC pi... By: uhclem