<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Rounded Rectangle</title>
    <link rel="stylesheet" href="../css/style.css">
    <script type="text/javascript" src="../../dist/paper-full.js"></script>
    <script type="text/paperscript" canvas="canvas">
        var path;

        function onFrame(event) {
            if (path)
                path.remove();
            path = new Path.Rectangle({
                radius: Math.abs(Math.sin(event.count / 40)) * 150 + 10,
                rectangle: {
                    size: [300, 300]
                },
                fillColor: 'black'
            });
            path.position = view.center;
        }
    </script>
</head>
<body>
    <canvas id="canvas" resize></canvas>
</body>
</html>