Thanks so much! Worked like a charm.
The only thing was that Math.round rounds it down at .5 which I worked around by entering beginning value as 30.5 instead of 30 (I’m sure there is a math function to do this as well), then with the right line graph all the other seconds lined up perfectly until the point where I intentionally was able to do the “speed ramp” and speed up the countdown exponentially, this time using a curve.