just like that
on ^*:JOIN:#:{
if ( $nick != $me ) {
if (!%Anti.Flood) {
inc -u15 %Anti.Flood
msg $chan $+(4+,$str(-,15),$str(-,$len($chan)),$str(-,$len($nick)),4+)
msg $chan $chr(124) Welcome to $+(,$rand(2,14),$chan,,$chr(44)) $+(4,$nick,) $chr(124)
msg $chan $+(4+,$str(-,15),$str(-,$len($chan)),$str(-,$len($nick)),4+)
}
}
}