training program with several puck.js

Ok, maybe try this code on the Pixl:

require("Font6x8").add(Graphics);
var MAXTIME = 60;
var lights = [];
var currentLight = undefined;
var lastLight = undefined;
var score = 0;
var timer = 0;
var timerInterval;
function addrToId(addr) {
  var d = addr.substr(12,5).split(":").map(n=>parseInt(n,16));
  return (d[0]<<8)|d[1];
}
function show(txt) {
  g.clear(1).setFont6x8().setFontAlign(0,-1).drawString(txt,16,0).flip();
}
function show2(txta, txtb) {
  g.clear(1).setFont6x8().setFontAlign(-1,-1).drawString(txta,0,0);
  g.setFontAlign(1,-1).drawString(txtb,31,0).flip();
}
function startDeviceScan() {
  show("Scan...");
  NRF.findDevices(function(devices) {
    show(`Got ${devices.length}`);
    print("  "+devices.map(d=>d.id+" => "+addrToId(d.id)).join("\n  "));
    lights = devices.map( d => addrToId(d.id) );
    if (lights.length>2)
      setTimeout(startGame, 1000);
  }, {timeout : 5000, filters : [{ namePrefix:"BTK" }] });
}
function showNewLight() {
  var light;
  do {
    light = lights[Math.floor(Math.random()*lights.length*0.999)];
  } while (light==currentLight || light==lastLight);
  lastLight = currentLight;
  currentLight = light;
  console.log("Light ", light);
  NRF.setAdvertising({},{
    showName:false,
    manufacturer:0x0590,
    manufacturerData:[0,0,light>>8,light&0xFF],
    whenConnected:true,
    interval: 100
  });  
}
function stopLights() {
  console.log("Stop Lights");
  NRF.setAdvertising({},{
    showName:false,
    manufacturer:0x0590,
    manufacturerData:[0,0,0,0],
    whenConnected:true,
    interval: 100
  });
  setTimeout(function() {
    NRF.setAdvertising({},{showName:true, interval:375});
  }, 5000);
}
setWatch(showNewLight, BTN1, {repeat:true});
function startGame() {
  show("GO!");
  timer = MAXTIME;
  score = 0;
  showNewLight();
  NRF.setScan(function(d) {  
    var m = d.manufacturerData;
    console.log(addrToId(d.id), m);
    if (addrToId(d.id) == currentLight) {
      var time = (m[2]<<8) | m[3];
      console.log("Light pressed", time+" ms");
      score++;
      show2(timer+"s", score);
      showNewLight();
    }
  }, { filters: [{ manufacturerData:{0x0590:{}} }] });
  if (timerInterval) clearInterval();
  timerInterval = setInterval(function() {
    if (timer>0) {
      timer--;
      show2(timer+"s", score);
      if (timer==0) stopLights(); // turn lights off
    } else {
      show("="+score+"=");
      setTimeout(function() {
        show("");
      }, 500);
    }
  }, 1000);
}
startDeviceScan();

I tried it and it does seem to scan and display something.

Remember to get it to work with the Pucks they have to have been turned on by pressing them, and you need them and Pixl.js to be disconnected from the Web IDE