Animal Planet Elevator - Part 2
The inside of the elevator masked, and the overhead elevator lighting is tinted dark blue. The bars on the floor and the door would be part of the mask, but the bars on the wall and ceiling could be installed in the piece.
Would be executed in library elevators, and potentially in the elevators of middle and high schools. (More typically on the east coast or cities with colder climates where schools are all indoors)