Here is a new wall-mounted kinetic sculpture by David C. Roy entitled Labyrinth. Roy was inspired by an animation he found showing the optical effect created when layers of parallel lines are rotated in opposite directions. This simple concept, turned out to be a significant mechanical challenge, taking Roy some 5 years to perfect in physical form. The time and effort were worth it. The final sculpture shown in the video produces a beautiful motion and effect, is easy to operate and will run for a full 12 hours. There is a detailed recounting of the creation process on the artist's blog.
You can learn more about the Labyrinth kinetic sculpture on the woodthatworks.com site.