V3: Clock with two faces

HTML

<script src="http://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="http://www.amcharts.com/lib/3/gauge.js"></script>
<div id="chartdiv" style="width: 50%; height: 362px;"></div>

JavaScript

var chart;
var sArrow;
var mArrow;
var hArrow;
var axis;

AmCharts.ready(function () {
    // clock is just an angular gauge with three arrows
    chart = new AmCharts.AmAngularGauge();
    chart.startDuration = 0.3;
    chart.adjustSize = false;
    
    // main face
    axis = new AmCharts.GaugeAxis();
    axis.startValue = 0;
    axis.endValue = 12;
    axis.valueInterval = 1;
    axis.minorTickInterval = 0.2;
    axis.showFirstLabel = false;
    axis.startAngle = 0;
    axis.endAngle = 360;
    axis.axisAlpha = 0.3;
    chart.addAxis(axis);
    
    // seconds face
    var axis2 = new AmCharts.GaugeAxis();
    axis2.startValue = 0;
    axis2.endValue = 60;
    axis2.valueInterval = 15;
    axis2.minorTickInterval = 1;
    axis2.showFirstLabel = false;
    axis2.startAngle = 0;
    axis2.endAngle = 360;
    axis2.fontSize = 9;
    axis2.radius = 40;
    axis2.centerY = 60;
    axis2.inside = false;
    axis2.axisAlpha = 0.3;
    chart.addAxis(axis2);
    
    // hour arrow
    hArrow = new AmCharts.GaugeArrow();
    hArrow.radius = "50%";
    hArrow.clockWiseOnly = true;
    
    // minutes arrow
    mArrow = new AmCharts.GaugeArrow();
    mArrow.radius = "90%";
    mArrow.startWidth = 6;
    mArrow.nailRadius = 0;
    mArrow.clockWiseOnly = true;
    
    // seconds arrow
    sArrow = new AmCharts.GaugeArrow();
    sArrow.axis = axis2; // this arrow uses different axis
    sArrow.startWidth = 3;
    sArrow.nailRadius = 4;
    sArrow.color = "#CC0000";
    sArrow.clockWiseOnly = true;
    
    
    // update clock before adding arrows to avoid initial animation
    updateClock();
    
    // add arrows
    chart.addArrow(hArrow);
    chart.addArrow(mArrow);
    chart.addArrow(sArrow);
    
    chart.write("chartdiv");
    
    // update clock every second
    setInterval(updateClock, 1000);
});

// update clock
function updateClock() {
    // get date
    var date = new Date();
    var hours = date.getHours();
    var minutes = date.getMinutes();
    var...