It’s not easy but others have posted examples on the forum.
The trick of it is you need to have a timer that only sleeps for a second, updates a Number Item with the total amount of time remaining, then gets recreated to sleep for another second.
It’s not easy but others have posted examples on the forum.
The trick of it is you need to have a timer that only sleeps for a second, updates a Number Item with the total amount of time remaining, then gets recreated to sleep for another second.