Fetch several rss feeds from other blogs in one page

I am trying to make a function which take an rss fedd URL and fetches the most recent 2 posts. I have tried to remake the snippet from here to a full function in funtions.php as following. I don't want to use a plugin for this since the plugins I have looked at have been close to impossible to style with my own html...

function fetch_feed_from_blogg($path) {
$rss = fetch_feed($path);

if (!is_wp_error( $rss ) ) : 

    $maxitems = $rss->get_item_quantity(2); 
    $rss_items = $rss->get_items(0, $maxitems); 
endif;

function get_first_image_url($html)
    {
      if (preg_match('/<img.+?src="(.+?)"/', $html, $matches)) {
      return $matches[1];
      }
    }

function shorten($string, $length) 
{
    $suffix = '&hellip;';

    $short_desc = trim(str_replace(array("/r", "/n", "/t"), ' ', strip_tags($string)));
        $desc = trim(substr($short_desc, 0, $length));
        $lastchar = substr($desc, -1, 1);
          if ($lastchar == '.' || $lastchar == '!' || $lastchar == '?') $suffix='';
              $desc .= $suffix;
        return $desc;
}

    if ($maxitems == 0) echo '<li>No items.</li>';
    else 
    foreach ( $rss_items as $item ) :

$html = '<ul class="rss-items" id="wow-feed"> <li class="item"> <span class="rss-image"><img src="' .get_first_image_url($item->get_content()). '"/></span>
        <span class="data"><h5><a href="' . esc_url( $item->get_permalink() ) . '" title="' . esc_html( $item->get_title() ) . '"' . esc_html( $item->get_title() ) . '</a></h5></li></ul>';

   return $html;
}

I am also trying to make it so that it can be used several times on a single page.