Rainbow.pl [Update]

    # True Rainbow?
    # True Rainow

    use strict;
    use warnings;
    use feature 'switch';
    use Xchat ':all';

    Xchat::hook_command('rainbow', 'rainbow_test');

    my %colors = (
        Red    => '04',
        Orange => '07',
        Yellow => '08',
        Green  => '03',
        Blue   => '02',
        Indigo => '06',
        Violet => '06');

    sub str2rainbow ($){
        my $data = shift;
        my @str = split(//, $data);
        if (@str > 7) {
            splitbow(@str);
        }
        else {
            rainbow(@str);
        }
    }

    sub rainbow_test {
        my $msg = $_[1][1];
        Xchat::command('MSG '. Xchat::get_info('channel') . ' ' .str2rainbow($msg));
    }

    sub rainbow {
        my @str = @_;
        my $return_str = '';
        my $state = 0;
        foreach my $letter (@str) {
            if ($letter eq ' ') {
                $return_str .= ' ';
            }
            else {
                given ($state) {
                    when(0) {
                        $return_str .= "\003$colors{Red}$letter";
                    }
                    when(1) {
                        $return_str .= "\003$colors{Orange}$letter";
                    }
                    when(2) {
                        $return_str .= "\003$colors{Yellow}$letter";
                    }
                    when(3) {
                        $return_str .= "\003$colors{Green}$letter";
                    }
                    when(4) {
                        $return_str .= "\003$colors{Blue}$letter";
                    }
                    when(5) {
                        $return_str .= "\003$colors{Indigo}$letter";
                    }
                    when(6) {
                        $return_str .= "\002\003$colors{Violet}$letter\002";
                    }
                }
                ++$state;
            }
        }
        return $return_str;
    }

    sub splitbow {
        my @str         = @_;
        my $str_copy    = join('', @str);
        $str_copy =~ s/\s+//g;
        my $return_str  = '';
        my @colors      = values %colors;
        my $color_state = 0;
        my $count_state = 0;
        my $array_size  = length(join '', $str_copy);
        my $per_color   = $array_size/7;
        my $data        = '';
        my @things      = ('','','','','','','');
        foreach my $letter (@str) {
            if ($count_state > $per_color && $color_state != 06) {
                ++$color_state;
                $count_state = 0;
            }
            if ($letter =~ m/\s/) {
                $things[$color_state] .= ' ';
            }
            else {
                $things[$color_state] .= $letter;
                ++$count_state;
            }
            }
        return rainbowformat(@things);
    }

    sub rainbowformat {
        my $data = '';
        my $counter = 0;
        my @color = ('04','07','08','03','02','06','06');
        foreach my $thing (@_) {
            if ($counter != 6) {
                $data .= "\003$color[$counter]$_[$counter]\003";
            }
            else {
                $data .= "\003$colors{Violet}\002$_[6]\002\003";
            }
            $counter++;
        }
        return $data
    }