How to change the numbers to random numbers?

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Perl

Hello i would like to change the numbers of my code to random or as a sumn:

my @codes = qw(9 45 180 82 233 134 21 164 166 209 5 217 231 129 192 14);
my $str = encode_base64 pack 'C*', @codes;

Im using base64 with perl.

I know how to call random numbers but i can not put them in the @codes.

my $range = 15;
my $minimum = 75;
my $random_number = int(rand($range)) + $minimum;

normaly i could add $random_number on the place where i want the number to be called but i cant get it working for this script. I think thats because of the base64 encoding. I would like to manually call each number seperate.

Anyone knows how to get this working?

All help appreciated.