Mine

on *:TEXT:`part:#: { 
  if ($nick($chan,0) < 5) { 
    /notice $nick 15You need4 5 users in 4 $+ $chan 15for $me To part. 
  }
   else {
     /msg $chan I am now leaving your channel. To make me come back type. /invite $me $chan
     /part $chan Cya!
  } 
}  
on *:INVITE:#: { 
  .timer 1 1 /checkusers $chan 
} 
alias checkusers { 
  if ($nick($chan,0) < 5) { notice $1 15You need 4 5 users 15in 4 $1 15for 4 $me | /part $chan

  } 
  else {$nick($chan,0) < 5 { notice $1 15This channel meet's the 4minimum 15user req's } 
} 
on *:join:#:{  
  if ($nick == $me) { 
    .timer 1 2 /checkusers $chan 
  } 
}