on *:INVITE:#:{
  notice $chan Please wait for an avalable bot
  if ($me == etcbot1 && $chan(0)) == 30) {
    msg [ss]etcbot2 join $chan
  }
  elseif ($me == [ss]etcbot2 && $chan(0)) == 30) {
    msg [pc]etcbot3 join $chan
  }
  elseif ($me == [pc]etcbot3 && $chan(0)) == 30) {
    msg [cw]etcbot4 join $chan
  }
  elseif ($me == [cw]etcbot4 && $chan(0)) == 30) {
    notice $chan All bot are full, invite at another time
  }
}

of *:TEXT:join *:?:{
  if ($me == [ss]etcbot2 && $nick == etcbot1) {
    join $1
  }
  elseif ($me == [pc]etcbot3 && $nick == [ss]etcbot2) {
    join $1
  }
  elseif $me == [cw]etcbot4 && $nick == [pc]etcbot3) {
    join $1
  }