option = {

    title : {

        text: '浏览器占比变化',

        subtext: '纯属虚构',

        x:'right',

        y:'bottom'

    },

    tooltip : {

        trigger: 'item',

        formatter: "{a} <br/>{b} : {c} ({d}%)"

    },

    legend: {

        orient : 'vertical',

        x : 'left',

        data:['Chrome','Firefox','Safari','IE9+','IE8-']

    },

    toolbox: {

        show : true,

        feature : {

            mark : {show: true},

            dataView : {show: true, readOnly: false},

            restore : {show: true},

            saveAsImage : {show: true}

        }

    },

    calculable : false,

    series : (function (){

        var series = [];

        for (var i = 0; i < 30; i++) {

            series.push({

                name:'浏览器（数据纯属虚构）',

                type:'pie',

                itemStyle : {normal : {

                    label : {show : i > 28},

                    labelLine : {show : i > 28, length:20}

                }},

                radius : [i * 4 + 40, i * 4 + 43],

                data:[

                    {value: i * 128 + 80,  name:'Chrome'},

                    {value: i * 64  + 160,  name:'Firefox'},

                    {value: i * 32  + 320,  name:'Safari'},

                    {value: i * 16  + 640,  name:'IE9+'},

                    {value: i * 8  + 1280, name:'IE8-'}

                ]

            })

        }

        series[0].markPoint = {

            symbol:'emptyCircle',

            symbolSize:series[0].radius[0],

            effect:{show:true,scaleSize:12,color:'rgba(250,225,50,0.8)',shadowBlur:10,period:30},

            data:[{x:'50%',y:'50%'}]

        };

        return series;

    })()

};

setTimeout(function (){

    var _ZR = myChart.getZrender();

    var TextShape = require('zrender/shape/Text');

    // 补充千层饼

    _ZR.addShape(new TextShape({

        style : {

            x : _ZR.getWidth() / 2,

            y : _ZR.getHeight() / 2,

            color: '#666',

            text : '恶梦的过去',

            textAlign : 'center'

        }

    }));

    _ZR.addShape(new TextShape({

        style : {

            x : _ZR.getWidth() / 2 + 200,

            y : _ZR.getHeight() / 2,

            brushType:'fill',

            color: 'orange',

            text : '美好的未来',

            textAlign : 'left',

            textFont:'normal 20px 微软雅黑'

        }

    }));

    _ZR.refresh();

}, 2000);