Cool trick! What’s the current setup—just a NAND on a clock or you’re already pulsing some weird gate array? If we tie the output to a tiny LED or buzzer and feed it through a simple filter, we can make the signal go high only when the input pattern matches a “puzzle‑hunter” code. Maybe add a tiny debounce or a counter that checks for a secret key sequence before it starts blinking? Let me know the exact timing you’re using, and we’ll tweak the logic to keep the nerds talking and the rest of the world… silent.