) {
        $("#song-div").hide();
        $("#running").hide();
        $(".rotate").hide();
    }

    function createTiles(qtype) {
        return createTileCircle(qtype, 250);
    }

    function createTileCircle(qtype, radius) {
        var y_padding = 90;
        var x_padding = 200;
        var tiles = [];
        var qlist = track.analysis[qtype];
        var n = qlist.length;
        var R = radius;
        var alpha = Math.PI * 2 / n;
        var perimeter = 2 * n * R * Math.sin(alpha / 2);
      