If you've seen Mad Max: Fury Road, you're familiar with the concept that no one other than Furiosa was able to start the War Rig becuase she was the only one who knew the "sequence." I'm looking to do something similar with a project; a lock box with simple analog switches and triggers that should only open in a proper sequence. I'm having a hard time understanding, though, how to ensure the switches are thrown in order. Currently, the design allows for the switches to be thrown closed in any order and *voila* the lock comes open. What do I need to do/use to create a "sequencing" effect (here comes the kicker) while still remaining analog?