I got an idea for a cool cipher. It's a normal replacement cipher, with different lines going to a different letter, but then you hit a junction, and depending on the paths available to you, what goes to what changes. So if there's a left and a right turn the order of things gets reversed, or if there's only a left turn you shift everything once to the left, and it can make loops, so I can make information only show up after a certain number of loops.