Multiple widget without options

Hi all

I am trying to get my head around the “multiple widgets” – i. e. widgets that can be used on more than 1 sidebar.
The challenge in my case is low – the desired widget simply shall output some text. I know that I could simply use the text widget, but for reasons beyond simple explanation, I can’t.

Here’s my code – it’s in functions.php of my theme, can someone explain why it does not work (the widget is not appearing on the widgets page to select & add to sidebars)?

class pictureMulti {

  function widget_myPicture($args, $widget_ars = 1) {
    extract($args);

    if (is_numeric($widget_args))
      $widget_args = array('number' => $widget_args);
    $widget_args = wp_parse_args($widget_args, array('number' => -1));
    extract($widget_args, EXTR_SKIP);
    $options_all = get_option('widget_picture_multi');
    if (!isset($options_all[$number]))
      return;
    $options = $options_all[$number];
  ?>
      <p>some text to be displayed here.</p>
  <?php
  }

  function pictureMulti() {

  }

  function init() {
    if (!$options = get_option('widget_picture_multi'))
      $options = array();
    $widget_ops = array('classname' => 'widget_picture_multi', 'description' => 'Display Picture (Multi)');
    $name = 'Picture Multi';

    $registered = false;
    foreach (array_keys($options) as $o) {
      $id = "picturemulti-$o";
      $registered = true;
      wp_register_sidebar_widget($id, $name, array(&$this, 'widget'), $widget_ops, array('number' => $o));
    }
    if ($registered) {
      wp_register_sidebar_widget('picturemulti-1', $name, array(&$this, 'widget'), $widget_ops, array('number' => -1));
    }
  }
}

$pictureM = new pictureMulti();
add_action('widgets_init', array($pictureM, 'init'));

(Note: I was following this site: https://wp.gdragon.info/2008/07/06/create-multi-instances-widget/)

Thanks, tkhobbes