So guys, I need some help setting up a secret room.
I have limited space and want to ensure that any wiring and such are out of sight, except for when you are actually in the room (or not at all, if possible)
I'm trying to use pistons to reveal a hidden room behind the altar of the church.
This is a view of the altar:

(the hole is just so I can move freely for now)
this is a view from the hidden room:

so yeah, I need someone to tell me how I could position the pistons and how to run the redstone and such.