flat

I am currently designing a set for "The Drowsy Chaperone." Using fabric flats, and LED Pars from behind i would like to create the effect of having painted walls turn in to colored windows. My Idea is to custom build soft flats using medium wight Muslin, then on the backside make french window...

I've been assigned a project to create a flat object that can flip out of a 2 foot tall platform built on top of a stage. However, it has to be able to flip out like this both quickly and slowly. Are there any suggestions for ideas of a kind of mechanism I could create to do this?