Shortcode

Update: I just noticed. Activating your plugin changes the default wordpress tag cloud to colorful tags. Howerver, the size of the fonts are all the same. It needs to be different sizes. I can do it with css but is there a way to specify random font sizes?

I am using the code:
<?php
$args = array(
‘taxonomy’ => array(‘category’),
);
wp_tag_cloud($args);
?>