on *:TEXT:!counter*:#:{
  if ($2 == on) {
    set %counterZ on 
    if ($2 == off) {
      set %counterZ off 
    }
  }
}

on *:JOIN:#:{
  if (%counterZ == off) { halt }
  if (%counterZ == on) {
    inc %tot. [ $+ [ $chan ] ]
.msg $chan 7 Welcome to $chan , Enjoy your stay. Your Guest number is  %tot. [ $+ [ $chan ] ]  7 since i've been counting } }