How to display a countdown timer on button press?

I see here: Redirecting... that its possible to have a pit timer on button press, can someone point me in the right direction on how to acheive this? I have created an overlay that is triggered when my pit limiter switch is enabled (this also flashes the LED’s and fixes the car speed to t0 58kmh - done in my emu black), I assume its a numer channel but cant find any info on it (yet!)…

Figured this out - use a countdown timer on button press with an overlay! :upside_down_face: