on *:text:!tb *:#: {  
  if ($nick isop $chan) { 
    if ($2 == $null) notice $nick You didn't specify who to ban
    elseif ($3 == $null) notice $nick You didn't supply how many minutes to ban $2
    else {
      /ban -u $+ $3 $chan $2 2 
      /kick $chan $2 You will be unbanned in $3 minutes 
    }
  } 
}