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                <link href='//,400' rel='stylesheet' type='text/css'> <div class="wrapper"> <!-- <h1>Tween a tween! Huh?</h2> --> <h2>Tween the timeScale() of a timeline</h2> <p>By tweening the timeScale() of the particles timeline we can progressively speed up and slow down the entire animation with a single tween.</p> <div class="nav"> <button id="slow">slow: timeScale(0.1)</button> <button id="normal">normal: timeScale(1)</button> <button id="fast">fast: timeScale(4)</button> </div> <div class="demo" id="bubbleContainer"> </div> </div> <div class="brandBar"> <img src=""></div>


                /* Global styles come from external css*/ .demo{ background-color:black; width:600px; height:250px; overflow:hidden; position:relative; } .bubble{ border-radius: 50%; position: absolute; } .smallBubble{ width:20px; height:20px; background-color:#7ADD20; } .mediumBubble{ width:30px; height:30px; background-color:#7ADD20; } .largeBubble{ width:40px; height:40px; background-color:#7ADD20; } button { text-transform:none; } h1 { font-size:30px; } h2 { font-szie:20px; }


                //From 7 Hidden Gems of GSAP (Net Magazine) //Read full article: var sizes = ["small", "medium", "large"], bubbleContainer = document.getElementById("bubbleContainer"), slowBtn = document.getElementById("slow"), normalBtn = document.getElementById("normal"), fastBtn = document.getElementById("fast"), startY = 250, endY = -50; //build the timeline var particles = new TimelineMax(); for (var i = 0; i < 50; i++) { var sizeIndex = randomNumber(0,2); //get random number between 0 and 2 var size = sizes[sizeIndex]; //get random size var speed = (3 - sizeIndex) //larger faster var bubble = $('<div class="bubble ' + size + 'Bubble"/>').appendTo(bubbleContainer); //create a bubble particles.set(bubble, {y:startY, x:300}, 0) // place it at the bottom //create an animation at a random start time, speed, {y:endY, x:randomNumber(0, 600), repeatDelay:Math.random()*2, repeat:500}, Math.random() * 2) } // control the timeScale() of the timeline normal.onclick = function() {, 2, {timeScale:1, ease:Power1.easeIn}); // normal speed } slow.onclick = function() {, 2, {timeScale:0.1, ease:Power1.easeIn}); // 1/10th normal speed } fast.onclick = function() {, 2, {timeScale:4, ease:Power1.easeIn}); // 4 times as fast } function randomNumber(min, max){ return Math.floor(Math.random() * (1 + max - min) + min); }