[Ostgur]

//вешаешь в 1 кадр
this.createTextField("my_txt", 1, 10, 10, 100, 100);

function textSlim(tex, str:String) {
	tex.text = str;
	var intOstgur = setInterval(funcOstgur, 100);
	function funcOstgur(){
		tex.text = tex.text.substr(1, tex.text.length);	
	if (tex.text == '') {
		tex.text = str;		
	}
  }
}

textSlim(my_txt, 'j...s die for our sins - j...s die for our sins');