Finally a more minimalist version that shows three progress bars (hours, minutes, seconds):
print "\e7";
loop {
my $time = DateTime.now;
put '#' x $_ ~ '.' x (24 - $_) given $time.hour.round;
put '#' x $_ ~ '.' x (60 - $_) given $time.minute.round;
put '#' x $_ ~ '.' x (60 - $_) given $time.second.round;
sleep 1;
print "\e8";
}
END put "\n";