on *:TEXT:!logstart:#:{
  if ((%Logfile. [ $+ [ $chan ] ] == $null) && ($nick == Your Nick Name)) {
    /set %logfile. [ $+ [ $chan ] ] on
    /msg $chan 5 Log for $chan has started!
  }
}
on *:TEXT:!LogStop:#:{
  if ((%logfile. [ $+ [ $chan ] ] == on) && ($nick == Your Nick Name)) {
    /unset %logfile. [ $+ [ $chan ] ]
    /msg $chan 5 logging of $chan has ended!
  }
}
on *:TEXT:*:#:{
  if (%logfile. [ $+ [ $chan ] ] == on) {
    /write $chan $+ .txt $asctime(hh:nn:ss) $nick $1- 
  }
}