hi I started to learn as3 using fdt i managed to put texts on screen now i want to show the text after the button is clicked but the button does not appear

here is the code

` package { import flash.events.MouseEvent; import flash.media.Camera; import mx.controls.Button; import flash.display.Sprite; import flash.text.TextField;

public class test2 extends Sprite 
{
       private var tField:TextField;

     public function click(e:MouseEvent):void
     {
        tField = new TextField();
        tField.text="ffff";
        addChild(tField);
    }
       public function test2():void 
       {
        var aa:Button=new Button();
        aa.label="deneme";
        aa.x=100;
        aa.y=200;
        aa.addEventListener(MouseEvent.CLICK, click)
       }
}

}

`

help me pleaseee