In this exercise, you will develop your own encryption method. It may have some basis in one of the example methods from the lectures but should have some unique element that you create.

Explain your encryption algorithm so that your instructor or another student is able to use it to encrypt and decrypt a message. In your explanation of how to use the algorithm, encrypt and decrypt the message "This is a test". You may use diagrams or any other method that you think is useful to explain your algorithm