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HTML

              
                <html lang="en">
<head>
    <!-- Basic Page Needs
    ================================================== -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Sparkle Trail and Dust Cursor</title>
    <meta name="description" content="Your Description Here">
    
    
<script type="text/javascript" src="js/jquery.1.11.1.js"></script>
  
  </body>
</html>
              
            
!

CSS

              
                body{
  background-color:black;
}

              
            
!

JS

              
                

var colour="random"; // "random" can be replaced with any valid colour ie: "red"...
var sparkles=100;// increase of decrease for number of sparkles falling

var x=ox=400;
var y=oy=300;
var swide=800;
var shigh=600;
var sleft=sdown=0;
var tiny=new Array();
var star=new Array();
var starv=new Array();
var starx=new Array();
var stary=new Array();
var tinyx=new Array();
var tinyy=new Array();
var tinyv=new Array();

colours=new Array('#ff0000','#00ff00','#ffffff','#ff00ff','#ffa500','#ffff00','#00ff00','#ffffff','ff00ff')

n = 10;
y = 0;
x = 0;
n6=(document.getElementById&&!document.all);
ns=(document.layers);
ie=(document.all);
d=(ns||ie)?'document.':'document.getElementById("';
a=(ns||n6)?'':'all.';
n6r=(n6)?'")':'';
s=(ns)?'':'.style';

if (ns){
	for (i = 0; i < n; i++)
		document.write('<layer name="dots'+i+'" top=0 left=0 width='+i/2+' height='+i/2+' bgcolor=#ff0000></layer>');
}

if (ie)
	document.write('<div id="con" style="position:absolute;top:0px;left:0px"><div style="position:relative">');

if (ie||n6){
	for (i = 0; i < n; i++)
		document.write('<div id="dots'+i+'" style="position:absolute;top:0px;left:0px;width:'+i/2+'px;height:'+i/2+'px;background:#ff0000;font-size:'+i/2+'"></div>');
}

if (ie)
	document.write('</div></div>');
(ns||n6)?window.captureEvents(Event.MOUSEMOVE):0;

function Mouse(evnt){

	y = (ns||n6)?evnt.pageY+4 - window.pageYOffset:event.y+4;
	x = (ns||n6)?evnt.pageX+1:event.x+1;
}

(ns)?window.onMouseMove=Mouse:document.onmousemove=Mouse;

function animate(){

	o=(ns||n6)?window.pageYOffset:0;

	if (ie)con.style.top=document.body.scrollTop + 'px';

	for (i = 0; i < n; i++){

		var temp1 = eval(d+a+"dots"+i+n6r+s);

		randcolours = colours[Math.floor(Math.random()*colours.length)];

		(ns)?temp1.bgColor = randcolours:temp1.background = randcolours; 

		if (i < n-1){

			var temp2 = eval(d+a+"dots"+(i+1)+n6r+s);
			temp1.top = parseInt(temp2.top) + 'px';
			temp1.left = parseInt(temp2.left) + 'px';

		} 
		else{

			temp1.top = y+o + 'px';
			temp1.left = x + 'px';
		}
	}

	setTimeout("animate()",10);
}

animate();

window.onload=function() { if (document.getElementById) {
	var i, rats, rlef, rdow;
	for (var i=0; i<sparkles; i++) {
		var rats=createDiv(3, 3);
		rats.style.visibility="hidden";
		rats.style.zIndex="999";
		document.body.appendChild(tiny[i]=rats);
		starv[i]=0;
		tinyv[i]=0;
		var rats=createDiv(5, 5);
		rats.style.backgroundColor="transparent";
		rats.style.visibility="hidden";
		rats.style.zIndex="999";
		var rlef=createDiv(1, 5);
		var rdow=createDiv(5, 1);
		rats.appendChild(rlef);
		rats.appendChild(rdow);
		rlef.style.top="2px";
		rlef.style.left="0px";
		rdow.style.top="0px";
		rdow.style.left="2px";
		document.body.appendChild(star[i]=rats);
	}
	set_width();
	sparkle();
}}

function sparkle() {
	var c;
	if (Math.abs(x-ox)>1 || Math.abs(y-oy)>1) {
		ox=x;
		oy=y;
		for (c=0; c<sparkles; c++) if (!starv[c]) {
			star[c].style.left=(starx[c]=x)+"px";
			star[c].style.top=(stary[c]=y+1)+"px";
			star[c].style.clip="rect(0px, 5px, 5px, 0px)";
			star[c].childNodes[0].style.backgroundColor=star[c].childNodes[1].style.backgroundColor=(colour=="random")?newColour():colour;
			star[c].style.visibility="visible";
			starv[c]=50;
			break;
		}
	}
	for (c=0; c<sparkles; c++) {
		if (starv[c]) update_star(c);
		if (tinyv[c]) update_tiny(c);
	}
	setTimeout("sparkle()", 40);
}

function update_star(i) {
	if (--starv[i]==25) star[i].style.clip="rect(1px, 4px, 4px, 1px)";
	if (starv[i]) {
		stary[i]+=1+Math.random()*3;
		starx[i]+=(i%5-2)/5;
		if (stary[i]<shigh+sdown) {
			star[i].style.top=stary[i]+"px";
			star[i].style.left=starx[i]+"px";
		}
		else {
			star[i].style.visibility="hidden";
			starv[i]=0;
			return;
		}
	}
	else {
		tinyv[i]=50;
		tiny[i].style.top=(tinyy[i]=stary[i])+"px";
		tiny[i].style.left=(tinyx[i]=starx[i])+"px";
		tiny[i].style.width="2px";
		tiny[i].style.height="2px";
		tiny[i].style.backgroundColor=star[i].childNodes[0].style.backgroundColor;
		star[i].style.visibility="hidden";
		tiny[i].style.visibility="visible"
	}
}

function update_tiny(i) {
	if (--tinyv[i]==25) {
		tiny[i].style.width="1px";
		tiny[i].style.height="1px";
	}
	if (tinyv[i]) {
		tinyy[i]+=1+Math.random()*3;
		tinyx[i]+=(i%5-2)/5;
		if (tinyy[i]<shigh+sdown) {
			tiny[i].style.top=tinyy[i]+"px";
			tiny[i].style.left=tinyx[i]+"px";
		}
		else {
			tiny[i].style.visibility="hidden";
			tinyv[i]=0;
			return;
		}
	}
	else tiny[i].style.visibility="hidden";
}

document.onmousemove=mouse;
function mouse(e) {
	if (e) {
		y=e.pageY;
		x=e.pageX;
	}
	else {
		set_scroll();
		y=event.y+sdown;
		x=event.x+sleft;
	}
}

window.onscroll=set_scroll;
function set_scroll() {
	if (typeof(self.pageYOffset)=='number') {
		sdown=self.pageYOffset;
		sleft=self.pageXOffset;
	}
	else if (document.body && (document.body.scrollTop || document.body.scrollLeft)) {
		sdown=document.body.scrollTop;
		sleft=document.body.scrollLeft;
	}
	else if (document.documentElement && (document.documentElement.scrollTop || document.documentElement.scrollLeft)) {
		sleft=document.documentElement.scrollLeft;
		sdown=document.documentElement.scrollTop;
	}
	else {
		sdown=0;
		sleft=0;
	}
}

window.onresize=set_width;
function set_width() {
	var sw_min=999999;
	var sh_min=999999;
	if (document.documentElement && document.documentElement.clientWidth) {
		if (document.documentElement.clientWidth>0) sw_min=document.documentElement.clientWidth;
		if (document.documentElement.clientHeight>0) sh_min=document.documentElement.clientHeight;
	}
	if (typeof(self.innerWidth)=='number' && self.innerWidth) {
		if (self.innerWidth>0 && self.innerWidth<sw_min) sw_min=self.innerWidth;
		if (self.innerHeight>0 && self.innerHeight<sh_min) sh_min=self.innerHeight;
	}
	if (document.body.clientWidth) {
		if (document.body.clientWidth>0 && document.body.clientWidth<sw_min) sw_min=document.body.clientWidth;
		if (document.body.clientHeight>0 && document.body.clientHeight<sh_min) sh_min=document.body.clientHeight;
	}
	if (sw_min==999999 || sh_min==999999) {
		sw_min=800;
		sh_min=600;
	}
	swide=sw_min;
	shigh=sh_min;
}

function createDiv(height, width) {
	var div=document.createElement("div");
	div.style.position="absolute";
	div.style.height=height+"px";
	div.style.width=width+"px";
	div.style.overflow="hidden";
	return (div);
}

function newColour() {
	var c=new Array();
	c[0]=255;
	c[1]=Math.floor(Math.random()*256);
	c[2]=Math.floor(Math.random()*(256-c[1]/2));
	c.sort(function(){return (0.5 - Math.random());});
	return ("rgb("+c[0]+", "+c[1]+", "+c[2]+")");
}
// ]]>

              
            
!
999px

Console