We can use the PieChart control to define a standard pie chart, but you probably make your applications cooler effect. Try to the following chart, isn’t cool?
CircleChart class is the main class of pie.
Chart.radius =  or CircleChart.radius = [40,160] // * if length=1: solid, if length=2: hollow
CircleChart.chartData.data = [12,34,34,34,45];
CircleChart.bevelMode = true;
Insert one element
CircleChart. insert(number:Number, color:*, index:uint = 0)
Remove one element
*laosafu(Chinese) is the author of this souce code, if you want to use this source code, say thanks to laosafu pls.