Beyond the almost universal inadvisability of "using a variable as a variable name" (already discussed in links from above), I get the feeling from your code that you expect a newly-defined Perl scalar to have a random value. This is not the case. A newly-defined, uninitialized scalar has the very well-defined state of undef, the, well, undefined value. But it's not random! You may come from a C/C++ background and have in mind the initial state of, e.g., a stack variable, but Perl doesn't work that way. In addition to rand, try searching CPAN or MetaCPAN for "random number", "random number generator", "pseudo-random number generator" or "PRNG".
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