on *:TEXT:brb:#x:{
  if (%gone. [ $+ [ $nick ] ] == $null) {
    set %gone. [ $+ [ $nick ] ] $ctime
    msg $chan $nick steps away from the Key Board.
  }
}
on *:TEXT:*back*:#x:{
  if (%gone. [ $+ [ $nick ] ] != $null) {
    msg $chan Welcome back, $nick You've been gone for: $duration($calc($ctime - %gone. [ $+ [ $nick ] ] $ctime))
    unset %gone. [ $+ [ $nick ] ]
  }
}