Hello Dr. Ocampo! I figured out how to add metadata to a transaction on-chain. THIS MESSAGE IS METADATA IN A TRANSACTION! I am using an application to do it, but using the Cardano CLI is cheaper. I had a hard time figuring out how to get data on-chain for a while, but it's here now. This message will live forever on the CARDANO blockchain. All someone needs is a tx ID; they can look it up on a chain explorer and see this message.