on *:TEXT:*:#: {
  if (($highlight($1-)) && ($away)) {
    /var %delta = $ctime - %lastHighlight. [ $+ [ $nick ] ]
    if ((!%lastHighlight. [ $+ [ $nick ] ]) || (%delta > 900)) {
      /notice $nick I am away: $awaymsg
    }
    /set -e %lastHighlight. [ $+ [ $nick ] ] $ctime
  }
}