please helpme

[phanimadhav]

package
{
import flash.display.S hape;
import flash.display.S prite;

import mx.controls.Ale rt;

public class Greeter extends Sprite
{
private var size:uint=80;
private var bgColor:uint=0x FFCC00;
private var borderColor:uin t=0x666666;
private var borderSize:uint =0;
private var cornerRadius:ui nt=9;
private var gutter:uint=5;
public function DisplayCircle() :void
{
var child:Shape=new Shape();
var halfsize:uint=M ath.round(size/2);
child.graphics. beginFill(bgCol or,1);
child.graphics. lineStyle(borde rSize,borderCol or);
child.graphics. drawCircle(half size,halfsize,h alfsize);
child.graphics. endFill();
addChild(child) ;
Alert.show("Thi s is mycircle","Aler t",Alert.OK) ;
}
}
}
this is my code but The circle was not appear.It is successfully complied but i don't know what happen there any one please help me