Any example of interval timer for fitbit versa?

[stillpointx]

Does anyone know where I can find an example of a fitbit versa interval timer code?

I'm working on an interval timer app for swimming while tethered

The app will use the vibration of the Fitbit Versa to tell the person when to start and stop each interval.

Basically I want to be able to set my timed intervals and also set when the vibration occurs on my start and stop intervals.

Example:

Start 1st interval: 5 minute swim 

Set vibrate 0 seconds after interval is done

Start 2nd interval: 30 second rest 

Set vibrate 5 seconds before end of interval

Start 3rd interval 20 minute swim

Set vibrate 0 seconds after interval is done

Start 4th interval: 30 second rest

Set vibrate 5 seconds before end of interval

Start 5th interval 5 minute swim

Set vibrate 0 seconds after interval is done

[JonFitbit]

How about this one https://github.com/johnliu55tw/Pomodoro-Ionic