I definitively did not understand everything in your code; it would seem 
It doesn’t make sense to be able to click on those pause/stop buttons if a timer has not started. Same as showing “pause” or “resume”, so it’s like in the waiting you have an active timer. Actually, I would hide the button instead. But I guess it’s fine to use “pause” label as default.
It alternates between both, alright. I thought it was a loop with one of those timers.
I’m not sure to understand the context, it looks pretty weird to me, I can change it.
I see.
Let me fix that before doing anything else. 