on *:TEXT:*brb*:#:{
  if (%gone. [ $+ [ $nick ] ] == $null) {
    /set %gone. [ $+ [ $nick ] ] $ctime
    .msg $chan 11 << 12 $nick 11>> has stepped away from the Keyboard.
  }
}

on *:TEXT:*back*:#:{
  if (%gone. [ $+ [ $nick ] ] != $null) {
    .msg $chan 11 << 12 $nick 11>> 10has returned 12Time Gone $duration($calc($ctime - %gone. [ $+ [ $nick ] ] $ctime)))
    /unset %gone. [ $+ [ $nick ] ] 
  }
}