PPG analysis beyond HR at rest

The code I used for that is:

var M = g.getWidth()/2;

var yr,yg,yc,yd;
var hrm;
var n = 0;
var sps = 0;
Bangle.on("HRM-raw",h => {
  hrm = h;
  sps++;
  /*if (n=!n) */g.scroll(0,1);
  g.setPixel(M,0,"#ff0");
  g.setColor(hrm.adjusted?"#000":"#0F0").f­illRect(yg, 0,yg=(h.raw/32),0);
  g.setColor("#F00").fillRect(yr, 0,yr=(M + h.filt/256 - 30),0);
  g.setColor("#F0F").fillRect(yc, 0,yc=(M + (h.raw-h.avg)/128 + 30),0);
  if (hrm.isBeat) g.fillRect(yr-4, 0,yr+4,0);  
});
Bangle.setHRMPower(1);
Bangle.setLCDTimeout(0);
Bangle.setLCDPower(1)
/*Bangle.on("HRM",h => {
  h.history.sort();
  print(h);
});*/
setInterval(function() {
  console.log(sps,"SPS");
  sps=0;
},1000);