I made the original idea/plan in Sketchup. It is easy to use and it functions as a great sketch pad. People can quickly see what you want to make but you do not have to go into every detail of what ever you are making. The easy and fun part is now over and I am starting the migration of the piece into Solidworks. Solidworks is great but I am always learning. The piece has four or five rotating wheels that light will be projected behind. There are some major engineering issues that have to be resolved but the most major one is how to have all these rotate and keep the supporting arm completely straight. Flex is bad. After I showed what I had done to Mark, very smart person. He made some suggestions that seemed to make sense. Make the functional mechanism a planetary gear system. Think of it as a all the mechanisms forming a pyramid protruding off the wall. It would be much more stronger then a pipe or rod coming of the wall. Flex would not be such a issue. hypothetically of course. So I threw out several weeks off work and started last week on a new system. It is not finished at all, but the main ideas of the mechanism is coming to light.
Update: I am now rethinking the planetary gear system, but the pyramid structure idea is good. More drawings need to be done to really figure it out.