Replying to Ever Been Done?

I just thought of a new idea for a rail that im thinking of maybe building. It would be a flat, down, flat, up, flat rail with each segment being equal in length. It would look kinda like this:


[URL=http://good-times.webshots.com/photo/2936665090072251157sYMpWZ][/URL]

Just wonderin if anybody has seen this type of rail.