'For example: Start / Stop the timer every time the cell. 'but may also be placed on a button or another ...

For a more advanced use case, you might want to run the timer in a separate thread. This way, your program can continue to do other tasks while the timer is running. The countdown_timer function takes ...

Do you have work to do and need a timer to keep you focused? You don’t need something overly sophisticated with many features, but a simple timer that uses minimal resources? Then, you may want to ...