This script checks to see if the person you have a query open with is still online. When someone you have a query open with goes offline a message will appear in that window alerting you of that. If the person comes back online it will also notify you in that case.
The script checks every 30 seconds to see if nicks are online
When a nick is offline it will only echo to the query window once every 30 minutes if they are still offline
This script will work for as many nicks as the particular network supports with the ison command, Rizon supports at least 8