tap-tempo | : heartpulse : Estimates BPM from tap events | iOS library

I've read through a lot of questions here at StackOverflow, but I can't seem to find the answer.

I want to be able to increment or decrement a range of numbers where I can loop back to the first or last number by pressing a button. While I have the max/min value, I want to have it so that every time the increment button is pressed, it increases by a specific number. For example, if the number range is from 69 to 108, it goes up by 4. And from 108 to 144, it increases by 8. Once the increment button hits the max, let's say 252, then I want it reset back to the min value 30, and then increase it again by 2. This also applies to the decrement button, except the number value goes down.

These are the number ranges where it gets increased by a specific number: