#!/usr/bin/perl
use warnings;
use strict;
use Tk;

my $dig_num = shift || 7;
my $bignum = 10**$dig_num;
#print "$bignum\n";
my $rand = int rand $bignum;

my @coded = $rand =~ /\d{1}/g;
print "@coded\n";
my @slots = ( 1 .. scalar @coded );

my $mw = MainWindow->new;
$mw->title("$rand");

$mw->fontCreate(
   'big',
   -family => 'arial',
   -size   => 38
);

my %lab;
foreach my $num ( @slots ) {
   $lab{ $num }{ 'count' } = 0;
   $lab{ $num }{ 'done' }  = 0;
   $lab{ $num }{ 'label' } = $mw->Label(
      -bg           => 'black',
      -fg           => 'green',
      -font         => 'big',
      -textvariable => \$lab{ $num }{ 'count' },
   )->pack( -side => 'left', -fill => 'x', -expand => 1 );
}


$mw->Button( -text => 'Go', -command => \&click )->pack();

MainLoop;

sub click {

   my $watch = shift @coded;
   my $sel = 1;
#   print "$watch $sel\n";

   my $timer;
   $timer = $mw->repeat(
      10,
      sub {
         foreach my $num ( @slots ) {

            if ( $lab{ $num }{ 'done' } == 1 ) { next }
               else {
                  $lab{ $num }{ 'count' } = int rand 10;
                   }

            if ( $lab{ $sel }{ 'count' } == $watch ) {
                 $lab{ $sel }{ 'done' } = 1;
                
                
              $watch = shift @coded; 
              if( ! defined $watch ){$timer->cancel}
                 else{
                    $sel++;
                    #print "$watch $sel\n";
                 }
            }
         }
      }
   );
}

__END__
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