import flash.display.MovieClip;
    import flash.text.TextField;

    public class MovieClipExample extends MovieClip {

        public function MovieClipExample() {
            var outputText:TextField = new TextField();
            outputText.text = "Testitexti";
            outputText.width = stage.stageWidth;
            outputText.height = outputText.textHeight;
            addChild(outputText);
        }
    }