Using the Tie::Cycle module, this can be simplified further ...
use Tie::Cycle;
tie my $whirley, 'Tie::Cycle', [ qw( . o 0 O 0 o ) ];
# And now for the demonstration ...
++$|;
while (1) {
print $whirley, "\b";
sleep 1;
}
perl -le 'print+unpack("N",pack("B32","00000000000000000000001000000000"))'
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