[j0hnik]

<div id="time">
	<span></span>:<span></span>:<span></span>
</div>
	<script>
var sp = document.querySelectorAll('#time span');
		(t=()=>{
			 new Date().toString().slice(15,24).split(':').forEach((d,i)=>{
			if(sp[i].textContent != d) sp[i].textContent = d;
		});
			setTimeout(t,1000);
		})();
	</script>

Для разнообразия