Мой текст

<h1 id="mytext">Мой текст</h1>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
<script type="text/javascript">
	$(function () {
	var $element = $('#mytext');
	setInterval(function () {
		$element.fadeOut(1500, function () {
			$element.fadeIn(1500, function () {
					$element.fadeOut(1500)
			});
		});
	},1500);
});
</script>