Click a letter to append it. Digits are sent as the numerals sign followed by A–I for 1–9 and K for 0, then the letters sign (J) to switch back.
Press Space to play or pause when the text box isn't focused.
Each letter is one fixed pair of arm positions, chosen from eight points spaced 45° apart around the signaler's body.
A pause with both flags down separates words — the same "rest" position a real signaler holds between groups.