Heay I made a quick tk version of the bcd clock if anyone wants it here it is.
It's sort of crappy and the idea was completely inspired by the great saint who started this.
PS. I know the logic is ugly as sin but didn't have time to be clever and make better.

#Emulate think geek binary clock in perl tk
use strict;
use warnings;

#Get package in PPM by install Tk
use English;
require TK;
use Tk;

#Varables
my %rb;        #Holds the radio buttons controller varables

#Setup the screen
my $main=MainWindow->new();
$main->MoveToplevelWindow(1,1);
$main->title("Binary Clock");

#Split screen up for hours minutes and seconds
my $lefttmp = $main->Frame()->pack(-side=>'left');
my $seconds = $main->Frame()->pack(-side=>'right');
my $hours = $lefttmp->Frame()->pack(-side=>'left');
my $minutes = $lefttmp->Frame()->pack(-side=>'right');

#Hours
my $h1 = $hours->Frame()->pack(-side=>'left');
my $h2 = $hours->Frame()->pack(-side=>'right');
my $h18 = $h1->Radiobutton(-value=>1,-variable=>\$rb{'h18'})->pack();
my $h14 = $h1->Radiobutton(-value=>1,-variable=>\$rb{'h14'})->pack();
my $h12 = $h1->Radiobutton(-value=>1,-variable=>\$rb{'h12'})->pack();
my $h11 = $h1->Radiobutton(-value=>1,-variable=>\$rb{'h11'})->pack();
my $h28 = $h2->Radiobutton(-value=>1,-variable=>\$rb{'h28'})->pack();
my $h24 = $h2->Radiobutton(-value=>1,-variable=>\$rb{'h24'})->pack();
my $h22 = $h2->Radiobutton(-value=>1,-variable=>\$rb{'h22'})->pack();
my $h21 = $h2->Radiobutton(-value=>1,-variable=>\$rb{'h21'})->pack();

#Minutes
my $m1 = $minutes->Frame()->pack(-side=>'left');
my $m2 = $minutes->Frame()->pack(-side=>'right');
my $m18 = $m1->Radiobutton(-value=>1,-variable=>\$rb{'m18'})->pack();
my $m14 = $m1->Radiobutton(-value=>1,-variable=>\$rb{'m14'})->pack();
my $m12 = $m1->Radiobutton(-value=>1,-variable=>\$rb{'m12'})->pack();
my $m11 = $m1->Radiobutton(-value=>1,-variable=>\$rb{'m11'})->pack();
my $m28 = $m2->Radiobutton(-value=>1,-variable=>\$rb{'m28'})->pack();
my $m24 = $m2->Radiobutton(-value=>1,-variable=>\$rb{'m24'})->pack();
my $m22 = $m2->Radiobutton(-value=>1,-variable=>\$rb{'m22'})->pack();
my $m21 = $m2->Radiobutton(-value=>1,-variable=>\$rb{'m21'})->pack();

#Seconds
my $s1 = $seconds->Frame()->pack(-side=>'left');
my $s2 = $seconds->Frame()->pack(-side=>'right');
my $s18 = $s1->Radiobutton(-value=>1,-variable=>\$rb{'s18'})->pack();
my $s14 = $s1->Radiobutton(-value=>1,-variable=>\$rb{'s14'})->pack();
my $s12 = $s1->Radiobutton(-value=>1,-variable=>\$rb{'s12'})->pack();
my $s11 = $s1->Radiobutton(-value=>1,-variable=>\$rb{'s11'})->pack();
my $s28 = $s2->Radiobutton(-value=>1,-variable=>\$rb{'s28'})->pack();
my $s24 = $s2->Radiobutton(-value=>1,-variable=>\$rb{'s24'})->pack();
my $s22 = $s2->Radiobutton(-value=>1,-variable=>\$rb{'s22'})->pack();
my $s21 = $s2->Radiobutton(-value=>1,-variable=>\$rb{'s21'})->pack();

#Setup screen update launcher
my $status_timer = Tk::After->new($main,'1000','repeat',\&process_loop
+);

#Loop for visuals
MainLoop();

sub process_loop {
    #Main loop of program
    #Varables
    my @lt = localtime;    #Get local time

    #Handle single 0 problem
    if(length($lt[2]) == 1) { $lt[2] = '0' . $lt[2]; }
    if(length($lt[1]) == 1) { $lt[1] = '0' . $lt[1]; }
    if(length($lt[0]) == 1) { $lt[0] = '0' . $lt[0]; }

    #Set the radio buttons
    set_bin(substr($lt[2],0,1),'h1');
    set_bin(substr($lt[2],1,1),'h2');
    set_bin(substr($lt[1],0,1),'m1');
    set_bin(substr($lt[1],1,1),'m2');
    set_bin(substr($lt[0],0,1),'s1');
    set_bin(substr($lt[0],1,1),'s2');
}

sub set_bin {
    #Ugly cludge to set the radio buttons
    my ($value, $varset) = @_;

    #Check 8
    if($value >= 8) {
        $rb{$varset . '8'} = 1;
        $value -= 8;
    } else {
        $rb{$varset . '8'} = 0;
    }

    #Check 4
    if($value >= 4) {
        $rb{$varset . '4'} = 1;
        $value -= 4;
    } else {
        $rb{$varset . '4'} = 0;
    }

    #Check 2
    if($value >= 2) {
        $rb{$varset . '2'} = 1;
        $value -= 2;
    } else {
        $rb{$varset . '2'} = 0;
    }

    #Check 1
    if($value >= 1) {
        $rb{$varset . '1'} = 1;
        $value -= 1;
    } else {
        $rb{$varset . '1'} = 0;
    }
}
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