Hi!
Since you said digital clock, I assume the last two numbers are seconds rather than hundredths of a second, as they would be on a stop watch.
The file below is a modification of this post, in which STOP serves as both stop and reset. Not what you want, but if you’re at all curious how the time-keeping works, you can examine this.
This in this version STOP means “pause” and START means “start” when the clock has been reset or “resume” when the clock has not been reset.
stop_start_clock.rp (65.0 KB)