Semaphore flags are used to communicate across distances if there is no other way. They have grown obsolete, but it’s still pretty fun to try to figure out what is being said. Normally, one would start with ATTENTION flags waving and wait for acknowledgment. All letters start with 'J' which also means LETTER START, telling the watcher that it is a letter word and not numbers. After each word, there is a special pose 'REST'. The first 2 steps are skipped, but by default, LETTER START and REST is also shown. You could show the answer in a QR code or plain text. If you need help, ask me; I'm xxcoder on Discord, or just send an email.