Retractible Armor Stand (Snapshot 14w32a)

I came up with the idea of making a retractible armor stand, and this is what i came up with.
I have to say that i am not good with redstone, but i made this as a concept or idea for the good redstoners out there, so i hope that this gives an idea to someone.

Also, this is my first post on Planet Minecraft, so if i made any mistake you are free to tell me ;D