HTML - Colocar noticias en un cintillo tipo marquesina

<div id="header">

        <marquee behavior="Scroll" class="none">

   	     <a style='color:red; font-size:1em; font-weight:bold; font-family: Arial; font-size: 24px;' href="http://feeds.feedburner.com/aporrea">href</a>

   	    </marquee>

</div>

.animacion {

display:block;

width:auto;

height:40px;

position:absolute;

font-family:georgia, serif;

font-size:16px;

line-height:40px;

float:left;

width:auto;

color:#000;

font-weight:bold;

padding:0 10px;

-webkit-animation-iteration-count: infinite;

-webkit-animation-timing-function: linear;

-webkit-animation-duration:17s;

-webkit-animation-name: scroll;

}

.animacion a {color:#c00;}

@-webkit-keyframes scroll {

0% {left:90%;}

100% {left:-100%;}

}

.animacion:hover { -webkit-animation-play-state: paused;}

<?php

$RSS = new LectorRSS ("http://feeds.feedburner.com/aporrea");

class LectorRSS {

var $url;

var $data;

function LectorRSS ($url){

$this->url;

$this->data = implode ("", file ($url));

}

function obtener_items (){

preg_match_all ("/<item .*>.*<\/item>/xsmUi", $this->data, $matches);

$items = array ();

foreach ($matches[0] as $match){

$items[] = new RssItem ($match);

}

return $items;

}

}

class RssItem {

var $title, $url;

function RssItem ($xml){

$this->populate ($xml);

}

function populate ($xml){

preg_match ("/<title> (.*) <\/title>/xsmUi", $xml, $matches);

$this->title = $matches[1];

preg_match ("/<link> (.*) <\/link>/xsmUi", $xml, $matches);

$this->url = $matches[1];

}

function obtener_titulo (){

return $this->title;

}

function obtener_url (){

return $this->url;

}

}

echo "<div>";

 echo "<marquee behavior='Scroll' class='none'  behavior='alternate'>";

foreach ($RSS->obtener_items () as $item){

printf ('<a target="_BLANK" href="%s">%s.   </a>', $item->obtener_url (), $item->obtener_titulo ());

}

 echo "</marquee>";

echo "</div>";

?>