Author's Note: I'm not sure it's obvious what this does so I will explain; this is the entrance for my secret bunker and it needed some protection so I added a combination lock which took a while to design but then I decided to make it hard for the person entering to type in the code. I therefor added a floor where all the blocks move independently and randomly so that you a buffeted and knocked around so you lose where each button is, but this wasn't enough so I added a stream of lava which starts when you enter the room. A the exit of the room I have a simple reset button which turns off the floor stops the lava and locks the door.