请问，如何在flash中制作，下载中，请等待的进度调？

...........假的进度条我会做.....真的代码太长了....
如果要假的...一桢一桢做..真的...
代码贴出来啊..

var myLoading:MovieClip;
var loadInfo:MovieClip;
var _lineBgcolor = "0x666666";
var _lineColor = "0x0000FF";
var _lineLen:Number = 200;
var _lineH:Number = 3;
var _txtColor; var _txtAlign:String = "center";
var tb:Number;
var txtFormat:TextFormat = new TextFormat
("Arial", null, 0x000000, true); myLoading = _root.createEmptyMovieClip("myLoading",10); //进度条
loadInfo = myLoading.createEmptyMovieClip("line", 10);
loadInfo.lineStyle(1, _lineColor, 20);
loadInfo.moveTo(0, 0);
loadInfo.lineTo(_lineLen, 0);
loadInfo.lineTo(_lineLen, _lineH);
loadInfo.lineTo(0, _lineH);
loadInfo.lineTo(0, 0); //进度显示文本
loadInfo.createTextField("txt", 30, 0, 0, _lineLen, 22);
loadInfo.txt.autoSize = _txtAlign; //设置进度条的位置（居中于主场景）
loadInfo._x = (Stage.w