const timeSpan = document.getElementById('time-span');
const time = new Date();

function wrapTime(timePart) {
  return timePart < 10 ? `0${timePart}` : timePart;
}

setTimeout(function () {
    timeSpan.textContent = `${wrapTime(time.getHours())}:${wrapTime(time.getMinutes())}:${wrapTime(time.getSeconds())}`;
}, 1000);