sub start_process{
    $b_started++ and return;
    my $count = 0;
    while ($count < 10) {
        print $count;
        # sleep 1;
        for (my $i = 0; $i < 10; $i++) {
            select(undef, undef, undef, 0.1);
            $mw->update;
        }
        $count ++;
    }
    $b_started = 0;
}