Log the time on every second

time.js

setInterval(function () {
  console.log(getTime(new Date()));
}, 1000);

function pad(n) {
  return n < 10 ? '0'+n : n;
}

function getTime(dt) {
  return pad(dt.getHours())+':'+pad(dt.getMinutes())+':'+pad(dt.getSeconds());
}