on @*:text:!warn*:#cdrsc: 
{  if ($nick isop $chan) 
{    if ($2 ison $chan) 
{      inc $+(%,warn,.,$2)      msg $chan $2 $+ , You have been warned by $nick for: $3- $+([,$($+(%,warn,.,$2),2),/,3,$chr(32),times])      if $($+(%,warn,.,$2),2) >= 3 
{        .kick $chan $2 You have been warned many times.        unset $+(%,warn,.,$2)      
}    
}    else {      msg $chan $2 is not in the channel.    
}  

}}