accessing randon number from perl script

abcdefg has asked for the wisdom of the Perl Monks concerning the following question:

I wrote a script where I am appending three binary files together.The second file being a 32bytes of zeroes in binary format.Now I dont want to have this second file and i want to add these 32 bytes of zeroes in the script itself.I am not sure how to do that.

$cmd = "copy $vrl_1.bin/B + $32bytes.bin/B + $2.bin $3.bin";
system $cmd;
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i am not sure how can i hardcode the 32bytes of zeroes in this script.

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