JS1k: The JavaScript code golfing competition

(function(l,x,t,n){x.body[n].margin="0";x.body[n].overflow="hidden";var r=self.innerWidth,p=self.innerHeight,b=x.getElementById("c"),e=r/2,y=p/2,c=(t.sqrt(5)+1)/2,g=300,h=[],u=0,a=b.getContext("2d"),q=function(f,m){var d=m==0?t.pow(f,2)/30+100:m==1?t.sqrt(f)*30:m==2?f*3:g-f;return d},o=function(f,m){var d=m==0?t.log(f+2)*3.5:m==1?22-t.log(f+2)*3.5:t.log(t.sin(f/g*t.PI)*40+1)*4+1;return d},v=[[0,0],[1,2],[2,0],[3,1]][new Date().getTime()%4],k="rgba(0,0,0,"+(t.random()>0.5?0.3:0.1)+")";b.width=r;b.height=p;b[n].background="#000";function j(m,w,i,f){a.fillStyle=f;var d=e+t.cos(m*2*t.PI)*w;var s=y+t.sin(m*2*t.PI)*w;a.beginPath();a.arc(d,s,i,0,t.PI*2,true);a.fill()}(function(){u++;h.unshift({a:u*c,c:((u+(g/3))%g)/g});if(h.length>g){h.pop()}a.fillStyle=k;a.fillRect(0,0,r,p);for(var d=0;d<h.length;d++){var f=(1-d/g)*4;j(h[d].a,q(d+1,v[0]),o(d,v[1]),"hsla("+t.round((h[d].c)*360)+",100%,50%,"+f+")")}l.setTimeout(arguments.callee,20)})();ondblclick=function(d){c=(d.pageX-e)/r}})(window,document,Math,"style");

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

/*
PHIreworks! version 1.2
copyright 2010 by Greg Reimer (http://github.com/greim)
*/
(function(w,d,m,s){

	d.body[s].margin = '0';
	d.body[s].overflow = 'hidden';
	var width = self.innerWidth,
		height = self.innerHeight,
		canvas = d.getElementById('c'),
		midWidth = width / 2,
		midHeight = height / 2,
		PHI = (m.sqrt(5)+1)/2,
		amount = 300,
		dots = [],
		i = 0,
		context = canvas.getContext('2d'),
		dist = function(x,i){
			var result = i==0 ? m.pow(x,2)/30+100 : i==1 ? m.sqrt(x)*30 : i==2 ? x*3 : amount-x;
			return result;
		},
		size = function(x,i){
			var result = i==0 ? m.log(x+2)*3.5 : i==1 ? 22-m.log(x+2)*3.5 : m.log(m.sin(x/amount*m.PI)*40+1)*4+1;
			return result;
		},
		f = [[0,0],[1,2],[2,0],[3,1]][new Date().getTime()%4],
		opac = 'rgba(0,0,0,'+(m.random()>.5?.3:.1)+')';

	canvas.width = width;
	canvas.height = height;
	canvas[s].background = "#000";

	function placeDot(angle, distance, size, color){
		context.fillStyle = color;
		var x = midWidth + m.cos(angle*2*m.PI) * distance;
		var y = midHeight + m.sin(angle*2*m.PI) * distance;
		context.beginPath();
		context.arc(x, y, size, 0, m.PI*2, true);
		context.fill();
	}

	(function(){
		i++;
		dots.unshift({a:i*PHI,c:((i+(amount/3))%amount)/amount});
		if (dots.length > amount) { dots.pop(); }
		context.fillStyle = opac;
		context.fillRect(0,0,width,height);
		for (var j=0; j<dots.length; j++){
		var trans = (1-j/amount)*4;
			placeDot(
				dots[j].a,
				dist(j+1,f[0]),
				size(j,f[1]),
				"hsla("+m.round((dots[j].c)*360)+",100%,50%,"+trans+")"
			);
		}
		w.setTimeout(arguments.callee, 20);
	})();

	ondblclick = function (e) {
		PHI = (e.pageX - midWidth) / width;
	};

})(window,document,Math,'style');