在负载上动画D3圆环图

我有一个圆环图,里面有五个不同的弧形.数据不会更新,但我希望在页面加载时将整个图形转换为圆形,从选定的角度开始(在我的情况下为1.1*PI).这是图的jsfiddle:http://jsfiddle.net/Nw62g/

var data = [
    {name: "one", value: 10375},
    {name: "two", value:  7615},
    {name: "three", value:  832},
    {name: "four", value:  516},
    {name: "five", value:  491}
];

var margin = {top: 20, right: 20, bottom: 20, left: 20};
    width = 400 - margin.left - margin.right;
    height = width - margin.top - margin.bottom;

var chart = d3.select("body")
    .append('svg')
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
    .append("g")
    .attr("transform", "translate(" + ((width/2)+margin.left) + "," +
                                      ((height/2)+margin.top) + ")");

var radius = Math.min(width, height) / 2;

var color = d3.scale.ordinal()
    .range(["#3399FF", "#5DAEF8", "#86C3FA", "#ADD6FB", "#D6EBFD"]);

var arc = d3.svg.arc()
    .outerRadius(radius)
    .innerRadius(radius - 20);

var pie = d3.layout.pie()
    .sort(null)
    .startAngle(1.1*Math.PI)
    .endAngle(3.1*Math.PI)
    .value(function(d) { return d.value; });

var g = chart.selectAll(".arc")
    .data(pie(data))
   .enter().append("g")
    .attr("class", "arc");

g.append("path")
    .style("fill", function(d) { return color(d.data.name); })
    .attr("d", arc);

我将如何实现这一结果？