Sounds like a fun mash‑up. I’ve got a spare old CRT from a broken TV, a couple of 10‑kΩ resistors, and an old relay module that could act as a gate. If you need a power source, I’ve salvaged a battery pack from an old phone. Just wire the relay in series with the board’s output, hook the CRT to the relay, and you’ll have a glitchy loop on a real screen. Good luck, and watch the sparks—those can be a real eye‑sore if you’re not careful.