All pen except for the background. Use mouse to turn rings. To encode something, first turn the rings to wherever you want. Write down the key symbols at the top of your message. For each letter in the word you want to encode, pick any one of the 4 symbol options in the column and write that down. To decode something, turn the rings so that the key matches the key of the message sent to you. Find the symbol and look up the column to see what letter it is. Secret: the symbols are just numbers along with their reflections.
vsauce gave me the idea. The symbol system is also from the video. (https://www.youtube.com/watch?v=TvsiLV7RLx4)
