if ($MysqL)
{
    print "Has MysqL,Installing: ";
    $MysqLCmd = "/path/to/script/MysqL-install.pl $person > /dev/null 2>&1";
    $ssh_d->cmd("$MysqLCmd");
    print "OK\n";
}

$| = 1;
print "Enter a number between 3 and 5: ";
chomp( my $answer = <STDIN> );