Metronome on Thingy:52

Hi guys,

I just wrote a very basic code aiming at providing the metronome function on the Thingy:52.
I'm posting it here in case anyone's interested...

It was inspired by this much more elaborated Bangle.js app.
However, usage is pretty easy:
1) a short press on the button increases/decreases the bpm
2) a long press on the button changes direction of the setting

The blue led flashes on a long press
The red led flashes when bpm is reduced
The green led flashes when bpm is increased

var dir=1;
var bpm=60; 

function beep() {
  analogWrite(D27,0.5,{freq:440});
  digitalPulse(D29,1,50);
}

function onInit()
{
  setWatch(function(e){
    var isLong = (e.time-e.lastTime)>0.4;
    if(isLong)
    {
      analogWrite(D27,0.5,{freq:392});
      digitalPulse(D29,1,50);
      digitalPulse(LED3,1,100);
      dir=!dir;
    }
    if(dir)
    {
      bpm *=1.1;
      digitalPulse(LED2,1,100);
    }
    else
    {
      bpm *=0.91;
      digitalPulse(LED1,1,100);
    }
    clearInterval(interval);
    interval = setInterval(beep, 60000 / bpm);
  }, BTN1, {repeat:true, debounce:50, edge:"falling"});

  interval = setInterval(beep, 60000 / bpm);
  LED2.reset();

}

save();