code example of setTimeout() and setInterval() for node js

timers.js

var readline = require('readline');

var waitTime = 3000;
var currentTime = 0;
var waitInterval = 500;
var percentageWaited = 0;

function writeWaitingPercentage(p){
  readline.clearLine(process.stdout);
  readline.cursorTo(process.stdout, 0)
  process.stdout.write(`waiting for.....${p}%`);
}

var interval = setInterval(function(){
  currentTime += waitInterval;
  // console.log(`You are waiting ${currentTime/1000} seconds`);  
  percentageWaited = Math.floor((currentTime/waitInterval) * 100);
  writeWaitingPercentage(percentageWaited);
}, waitInterval);

setTimeout(function(){
  console.log("\n\nDone\n\n");
  clearInterval(interval);
}, waitTime);

writeWaitingPercentage(percentageWaited);