my $d  = int( $seconds / 86400 );
my $h  = int( ($seconds - $d*86400)           /  3600 );
my $m  = int( ($seconds - $d*86400 - $h*3600) /    60 );
my $s  = $seconds % 60;
print "$d days, $h hours, $m min, $s sec\n";