This is something that may be fun to add on a server though.

I added a controllromm with a 4 lever combenation lock if you want to turn the lights on or off, empty the pool. there are by the way signs over the two levers that is the key to open the door.

That i also where i added the store with a dispenser. so the person inside the controllroom may sell (or give away) items from the chest so others may have some fun in the pool.

Warning: There is a lot or redstone and that is why this is so big. be aware that the scematic isbigger than maby espected so you might want t dig a hole before plasing it ;)

Have fun and please RATE AND COMMENT :D