Please help with the script; I don't understand why nothing is coming up on the page. I am just doing a test one to learn how Arbor.js works,but so far nothing has happened... here's my code;
<head>
<script src="js/jquery-1.11.1.min.js"></script>
<script src="js/arbor.js"></script>
<script src="js/arbor-tween.js"></script>
</head>
<body>
<canvas id="viewport" width="800" height="600"></canvas>
<script type="text/javascript" language="javascript">
var sys = arbor.ParticleSystem(1000, 400,1);
sys.parameters({gravity:true});
sys.renderer = Renderer("#viewport") ;
var animals = sys.addNode('Animals',{'color':'red','shape':'dot','label':'Animals'});
</script>
</body>