Google Balls http://jsfiddle.net/pHGge/1/

google_balls_revised

$(function() {
    var canvas = $("#c");
    var canvasHeight;
    var canvasWidth;
    var ctx;
    var dt = 0.1;

    var pointCollection;

    function init() {
        updateCanvasDimensions();

        var g =
 [new Point(1, 1, 0.0, 9, "#ed9d33"),
  new Point(2, 20, 0.0, 8, "#d44d61"),
  new Point(3, 40, 0.0, 7, "#4f7af2"),
  new Point(1, 60, 0.0, 7, "#678822"),
  new Point(2, 80,0.0, 9, "#540AB3"),
  new Point(2, 70, 0.0, 8, "#c32711"),
  new Point(10, 3, 0.0, 7, "#ef0903"),
  new Point(20, 2, 0.0, 6, "#ea14a3"),
  new Point(30, 2, 0.0, 7, "#eb24b7"),
  new Point(40, 1, 0.0, 7, "#ec34c9"),
  new Point(10, 33, 0.0, 7, "#ef0903"),
  new Point(20, 32, 0.0, 6, "#ea14a3"),
  new Point(30, 32, 0.0, 7, "#eb24b7"),
  new Point(40, 31, 0.0, 7, "#ec34c9"),
  new Point(50, 31, 0.0, 8, "#ed44d1"),
  new Point(52, 33, 0.0, 9, "#ee55e6"),
  new Point(55, 20, 0.0, 8, "#245ab9"),
  new Point(60, 5, 0.0, 8, "#c32711"),
  new Point(60, 10,0.0, 9, "#874422"),
  new Point(107,40,0.0, 15,"#8a19c9"),
  new Point(137,40,0.0, 15,"#8a19c9"),
  new Point(120,15,0.0, 8,"#0edf7f"),
  new Point(120,75,0.0, 8,"#0edf7f"),
  new Point(89,45,0.0, 8,"#0edf7f"),
  new Point(155,45,0.0, 8,"#0edf7f"),
  new Point(100,25,0.0, 8,"#0edf7f"),
  new Point(140,65,0.0, 8,"#0edf7f"),
  new Point(100,65,0.0, 8,"#0edf7f"),
  new Point(140,65,0.0, 8,"#0edf7f"),
  new Point(145,25,0.0,8, "#0edf7f"),
  new Point(300, 83, 0.0, 9, "#d44d61"),
  new Point(256, 69, 0.0, 9, "#4f7af2"),
  new Point(199,3, 0.0, 4,"#6cdf2c"),
  new Point(201,13, 0.0, 4,"#bbdf3c"),
  new Point(200,23, 0.0, 4,"#dfdf2c"),
  new Point(201,33, 0.0, 5,"#dfb32c"),
  new Point(199,43, 0.0, 6,"#df8c2c"),
  new Point(198,53, 0.0, 7,"#df642c"),
  new Point(201,63, 0.0, 8,"#df782c"),
  new Point(202,69, 0.0, 9,"#df2c58"),
  new Point(212,69, 0.0, 10,"#df502c"),
  new Point(222,69, 0.0, 11,"#df782c"),
  new Point(232,69, 0.0, 12,"#df982c"),
  new Point(242,69, 0.0, 13,"#dfc72c"),
  new Point(252,69, 0.0, 14,"#cfdf2c")];     

        gLength = g.length;
        for (var i = 0; i < gLength; i++) {
            g[i].curPos.x = (canvasWidth/2 - 180) + g[i].curPos.x;
            g[i].curPos.y = (canvasHeight/2 - 65) + g[i].curPos.y;

            g[i].originalPos.x = (canvasWidth/2 - 180) + g[i].originalPos.x;
            g[i].originalPos.y = (canvasHeight/2 - 65) + g[i].originalPos.y;
        };

        pointCollection = new PointCollection();
        pointCollection.points = g;

        initEventListeners();
        timeout();
    };

    function initEventListeners() {
        $(window).bind('resize', updateCanvasDimensions).bind('mousemove', onMove);

        canvas.get(0).ontouchmove = function(e) {
            e.preventDefault();
            onTouchMove(e);
        };

        canvas.get(0).ontouchstart = function(e) {
            e.preventDefault();
        };
    };

    function updateCanvasDimensions() {
        canvas.attr({height: $(window).height(), width: $(window).width()});
        canvasWidth = canvas.width();
        canvasHeight = canvas.height();

        draw();
    };

    function onMove(e) {
        if (pointCollection)
            pointCollection.mousePos.set(e.pageX, e.pageY);
    };

    function onTouchMove(e) {
        if (pointCollection)
            pointCollection.mousePos.set(e.targetTouches[0].pageX, e.targetTouches[0].pageY);
    };

    function timeout() {
        draw();
        update();

        setTimeout(function() { timeout() }, 30);
    };

    function draw() {
        var tmpCanvas = canvas.get(0);

        if (tmpCanvas.getContext == null) {
            return;
        };

        ctx = tmpCanvas.getContext('2d');
        ctx.clearRect(0, 0, canvasWidth, canvasHeight);

        if (pointCollection)
            pointCollection.draw();
    };

    function update() {        
        if (pointCollection)
            pointCollection.update();
    };

    function Vector(x, y, z) {
        this.x = x;
        this.y = y;
        this.z = z;
 
        this.addX = function(x) {
            this.x += x;
        };

        this.addY = function(y) {
            this.y += y;
        };

        this.addZ = function(z) {
            this.z += z;
        };
 
        this.set = function(x, y, z) {
            this.x = x;
            this.y = y;
            this.z = z;
        };
    };

    function PointCollection() {
        this.mousePos = new Vector(0, 0);
        this.points = new Array();

        this.newPoint = function(x, y, z) {
            var point = new Point(x, y, z);
            this.points.push(point);
            return point;
        };

        this.update = function() {        
            var pointsLength = this.points.length;

            for (var i = 0; i < pointsLength; i++) {
                var point = this.points[i];

                if (point == null)
                    continue;

                var dx = this.mousePos.x - point.curPos.x;
                var dy = this.mousePos.y - point.curPos.y;
                var dd = (dx * dx) + (dy * dy);
                var d = Math.sqrt(dd);

                if (d < 150) {
                    point.targetPos.x = (this.mousePos.x < point.curPos.x) ? point.curPos.x - dx : point.curPos.x - dx;
                    point.targetPos.y = (this.mousePos.y < point.curPos.y) ? point.curPos.y - dy : point.curPos.y - dy;
                } else {
                    point.targetPos.x = point.originalPos.x;
                    point.targetPos.y = point.originalPos.y;
                };

                point.update();
            };
        };

        this.draw = function() {
            var pointsLength = this.points.length;
            for (var i = 0; i < pointsLength; i++) {
                var point = this.points[i];

                if (point == null)
                    continue;

                point.draw();
            };
        };
    };

    function Point(x, y, z, size, colour) {
        this.colour = colour;
        this.curPos = new Vector(x, y, z);
        this.friction = 0.8;
        this.originalPos = new Vector(x, y, z);
        this.radius = size;
        this.size = size;
        this.springStrength = 0.1;
        this.targetPos = new Vector(x, y, z);
        this.velocity = new Vector(0.0, 0.0, 0.0);

        this.update = function() {
            var dx = this.targetPos.x - this.curPos.x;
            var ax = dx * this.springStrength;
            this.velocity.x += ax;
            this.velocity.x *= this.friction;
            this.curPos.x += this.velocity.x;

            var dy = this.targetPos.y - this.curPos.y;
            var ay = dy * this.springStrength;
            this.velocity.y += ay;
            this.velocity.y *= this.friction;
            this.curPos.y += this.velocity.y;

            var dox = this.originalPos.x - this.curPos.x;
            var doy = this.originalPos.y - this.curPos.y;
            var dd = (dox * dox) + (doy * doy);
            var d = Math.sqrt(dd);

            this.targetPos.z = d/100 + 1;
            var dz = this.targetPos.z - this.curPos.z;
            var az = dz * this.springStrength;
            this.velocity.z += az;
            this.velocity.z *= this.friction;
            this.curPos.z += this.velocity.z;

            this.radius = this.size*this.curPos.z;
            if (this.radius < 1) this.radius = 1;
        };

        this.draw = function() {
            ctx.fillStyle = this.colour;
            ctx.beginPath();
            ctx.arc(this.curPos.x, this.curPos.y, this.radius, 0, Math.PI*2, true);
            ctx.fill();
        };
    };

    init();
});