on *:TEXT:brb*:#:{ 
  set %nickaway $2- 
  if ($2 == $null) /msg # $nick will be right back. Away for: No Reason Specified 
  else  msg # $nick will be right back. Away for: $2- 
} 
on *:TEXT:back:#:{ 
  msg # $nick is now back from away. Leaving Reason: %nickaway 
}