Edit in JSFiddle

<div id="some-id">div#some-id</div>

<script>
var el = document.getElementById("some-id");
el.textContent = "Text 1";
el.innerHTML = "<b>T</b><i>e</i><u>x</u><s>t</s> 1";
el.style.fontSize = '5em';
el.style.fontWeight = '900';
el.style.color = 'rgba(0,100,100,0.5)';
el.style.position = 'relative';

var x = 0, y = 0;
window.setInterval(function(){
	x = (x+2) % 600;
	y = (y+1) % 300;
	el.style.left = x+'px';
	el.style.top = y+'px';
}, 10);
</script>