Regulating time of Bangle.js 2

Well my actual code is more complex but the basic idea is this:

setInterval(function() {
  // adjust by 630 milliseconds
  let adjusted_time = Date.now() - 630;

  let delay = 1000 - (adjusted_time % 1000);
  setTimeout(function() {
    setTime((adjusted_time + delay) / 1000);
  }, delay);

  // adjust every 3 hours
}, 3 * 60 * 60 * 1000);

Every 3 hours:

1. get current watch time
   
2. calculate adjusted time
   
3. calculate delay until adjusted time is exact second
   
4. wait that delay and then set watch time in seconds
   
   

Only one running app must do this or else there will be too much adjustment. I'm currently using code like this in my clock app, but it would be best if it were run in a widget (however I havn't yet learned how to make widgets).