However, it's not so nice that they use a lot of indirect objects in their sample code... From the website:

$fountain = new X10_Item 'B1';
set $fountain ON if time_now '6:00 PM';
$movement_sensor = new Serial_Item 'XA2', 'stair';
play(file => 'stairs_creek*.wav') if state_now $movement_sensor eq 'st
+air';
[download]

It's probably meant to be more readable that way, but I don't agree it is. Sometimes, brackets can be a useful thing :).