Strange Attractors, Javascript

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var cnt = 0.0;
var aa = 0.0;
var bb = 0.0;
var cc = 0.0;
var dd = 0.0;
var ee = 0.0;
var ff = 0.0;
var xr = 0.0;
var yr = 0.0;
var zr = 0.0;

function setup() {
	createCanvas(800, 600,WEBGL);
	background(249);
	cnt = 0;	
	aa = random(-3,3);
	bb = random(-3,3);
	cc = random(-3,3);
	dd = random(-3,3);
	ee = random(-3,3);
	ff = random(-3,3);	
	xr = random(-1,1);
	yr = random(-1,1);
	zr = random(-1,1);
}

function draw() {
	cnt +=0.1;
		 
	var xm = mouseX / width + 0.5;
	var ym = mouseY / height + 0.5;

var pA = xm + aa ;
  var pB = ym - bb ;
  var pC = ym + cc ;
  var pD = xm + dd ;
  var pE = ym + ee ;
  var pF = ym - ff ;
	background(249);
	
	rotateX(cnt * PI * xr * 0.03);
  rotateY(cnt * PI * yr * 0.03);
  rotateZ(cnt * PI * zr * 0.03);

var prevX = 0.0;
  var prevY = 0.0;
  var prevZ = 0.0;
	
	var singularityX = 0.0;
	var singularityY = 0.0;
	var singularityZ = 0.0;
	
	stroke(60, 8, 60, 128);
  beginShape(POINTS);
  for (var i = 0; i < 60000; i++) {
		var x = sin(pA * prevY) - cos(pB * prevX);
    var y = sin(pC * prevZ) - cos(pD * prevY);
    var z = sin(pE * prevX) - cos(pF * prevZ);
		var scale = 6.0 + sin(cnt * PI * 0.05);

vertex(x * width / scale, y * height / scale, z * height / scale);
		prevX = x;
    prevY = y;
    prevZ = z;
		
		if(i == 10000){
			singularityX = x;
			singularityY = y;
			singularityZ = z;
		}
	}
  endShape(CLOSE);
	noFill();
	stroke(250, 200, 250, 10);
	push();
	translate(singularityX * width / scale, singularityY * height / scale, singularityZ * height / scale);
	sphere(1200.3);
	pop();
	
	
}

function mouseClicked() {
	changeVariable();
}

function changeVariable() {
	aa = random(-3,3);
	bb = random(-3,3);
	cc = random(-3,3);
	dd = random(-3,3);
	ee = random(-3,3);
	ff = random(-3,3);
	xr = random(-1,1);
	yr = random(-1,1);
	zr = random(-1,1);
}

[ + ] Show input
Absolute running time: 0.48 sec, cpu time: 0.63 sec, memory peak: 53 Mb, absolute service time: 0,66 sec