what will be order of numbers

EventEmitter_question.js

const EventEmitter = require('events');

const emiter_1 = new EventEmitter;
const emiter_2 = new EventEmitter;

process.nextTick(()=>console.log(0));
setTimeout(()=>console.log(1), 0);
setImmediate(()=>console.log(2));


emiter_1.on('event',handler.bind(null, 3));
emiter_1.on('event',handler.bind(null, 4));

emiter_2.on('event',handler.bind(null, 5));
emiter_2.on('event',handler.bind(null, 6));

emiter_1.emit('event');
emiter_2.emit('event');

function handler (n) {
  const finishAt = new Date().getTime() + 200;

  while (new Date().getTime() < finishdAt);

  console.log(n);
}