drupal custom block to display random image

whirlpool asked me to make him a custom block that displays a random image from the galleries.

I like my code because it uses taxonomy module functions instead of doing db queries.

< ?php
$albums = taxonomy_get_children(0, variable_get("image_nav_vocabulary", ""));
$foo = _image_album_properties($albums);
? >

<a href="/photos">
< img src="< ?php echo $foo[2]->thumb ? >" alt="random image"/>
</a>
<ul>
<li>gallery name: < ?php echo $foo[2]->name ? ></li>
<li>description: < ?php echo $foo[2]->description ? ></li>
<li>image count: < ?php echo $foo[2]->image_count ? ></li>
</ul>