I need more caffeine

Covers the screen with cats that split it more cats when clicked. (Works in Firefox and Chrome)

Cats = new Array();
var image = Math.floor(Math.random()*5+1); //Assuming you have five jpg that are named 1-5
function point(x,y){ 
	this.x = x;
	this.y = y;
}
function full() { return (Cats.length == (window.innerWidth/256 -1)*(window.innerHeight/256 -1)); }
function isSamePoint(p1,p2){return (p1.x == p2.x && p1.y == p2.y )}
function addthings(){ 
    window.setInterval(function () {
		if(!full())
			document.getElementById("cats").innerHTML =  document.getElementById("cats").innerHTML + thing(256,-1,-1);
    }, 1000); 
}
function rp(x) { var add=x%256/2;return (Math.floor((x/256-1)*Math.random())*256+add);} //Random selection
function lol(id,s,x,y) { //Splits div
	if(s==1) return; else s = s / 2;
	document.getElementById(id).innerHTML = thing(s,0,0) +
		thing(s,s,0) + thing(s,0,s) + thing(s,s,s);}
function thing(s, x , y ){
	var id = 100000*Math.random();
	if(x==-1) x = rp(window.innerWidth);
	if(y==-1) {y = rp(window.innerHeight);
		var p = new point(x,y);
		for (i=0;i<Cats.length;i++) 
			if(isSamePoint(Cats[i],p)) 
				if(full()) return "";
				else return thing(256,-1,-1);
		Cats[Cats.length] = p }
	return "<div id=\""+id+"\"  style=\"position: absolute;  left: " + x +"px; " + 
			"top: " + y +"px; \"><img onclick=\"lol("+id+","+s+","+x+","+y+")\" width \""+s+"x\" HEIGHT=\""+s+"px\" src=\""+image+".jpg\" /></div>"}

addthings();

This smoothly changes the background color somewhat randomly. (Works in Firefox and Chrome)

function colormeup(){
    var r = 255, g = 255, b = 255;
	var ar = 1+ranA(), ag = 1+ranA(), ab = 1+ranA();
	var t = 1000*Math.random(), at = 1;
	function ranA(){return Math.random()-.5;} 
    window.setInterval(function () {
        function c(x,a) 
			{return ('0' + Math.floor(127+Math.sin((t*a)*6.28/360) * 127).toString(16)).substr(-2);}
        document.body.style.background = '#' + c(r,ar) + c(g,ag) + c(b,ab);
		t += at;
    }, 16); 
}
colormeup();