Rainbow script made by me! Rainbow text is toggled using F1. The script also uses rainbow as an identifier so this allows for the use of $rainbow in other scripts

on *:input:*: {
  if (%rainbow == on && !$regex($1,/^[/\.~!]/)) {
    haltdef
    msg $active $rainbow($1-)
  }
  elseif (%rainbow == on && $1 == /me) {
    haltdef
    describe $active $rainbow($2-)
  }
}
alias rainbow {
  var %string $1-
  var %count 0
  var %color 1
  while (%count < $len($1-)) {
    var %color2 $gettok(04.07.08.09.03.12.06,%color,46)
    var %output %output $+ $iif($left(%string,1) != $chr(32), $+ $iif($left(%string,1) isnum,%color2,$remove(%color2,0)) $+ $iif(%output,$null,$chr(44) $+ 01) $+ $left(%string,1),$chr(32) $+ $chr(32))
    if ($left(%string,1) != $chr(32)) var %color $iif(%color == 7,1,$calc(%color + 1))
    var %string $right(%string,-1)
    inc %count
  }
  return %output $+ 
}
alias F1 {
  $iif(%rainbow == on,unset %rainbow,set %rainbow on)
  echo -a $iif(%rainbow == on,$rainbow(~~~~~~~),~~~~~~~)
}