But that doesn't make count 0 if count was 4 as the OP's code had it.
print "\b\b\b\b" unless $count %= 4
is closer but also executes the print statement for $count = 0, 8, 12, etc., and assigns 0 to $count for 8, 12, etc.
$count = 0, print "\b\b\b\b" if $count == 4;
but I'd use a block here.
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