(function () {
    var G = Object.prototype.hasOwnProperty,
        baselinePx = 4,
        faderWidth = 12 * baselinePx,
        faderHeight = 60 * baselinePx,
        trackWidth = faderWidth / 3,
        trackHeight = faderHeight - faderWidth,
        trackMargin = (faderWidth - trackWidth) / 2;
})();