Display 4 random tags with images

Hello, first I like to thank you guys for a very nice plugin!

Ok here we go. I would like to get 4 random tags to show on my homepage. But when I use my code all the tags show up. It seems like my count function is not working neither the shuffle .

Please, can someone give me some pointers?

The code got so far inside public-filters is this:

shuffle($terms);
$max_loop=1; //This is the desired value of Looping
$count = 0; //First we set the count to be zeo
	foreach( $terms as $term ) {

$count++; //Increase the value of the count by 1
if($count==$max_loop) { break; //Break the loop is count is equal to the max_loo
	}
		if ( ! isset( $term->image_id ) ) {
			continue;
		}
		$image = wp_get_attachment_image( $term->image_id, $args['image_size'] );
		if ( ! empty( $image ) ) {
			$output .= $args['before_image'] . '<li><p style="text-align: center;"><a href="' . esc_url( get_term_link( $term, $term->taxonomy ) ) . '">' . $image .'</a><br><a href="' . esc_url( get_term_link( $term, $term->taxonomy ) ) . '">' . $term->name . '</a></p></li>' . $args['after_image'] ;
		}
	}

	if ( ! empty( $output ) ) {
		return $args['before'] . $output . $args['after'];
	}
	return '';
}

http://wordpress.org/extend/plugins/taxonomy-images/