use strict;
use warnings;
use Data::Dumper;

my %hash = ( Sun  => 'day',
             Moon => 'night',
           );
my %hoh;
$hoh{correct} = { %hash };
$hoh{wrong}   = %hash;

print Dumper \%hoh;

##</code><code>##

$VAR1 = {
          'correct' => {
                         'Moon' => 'night',
                         'Sun' => 'day'
                       },
          'wrong' => '2/8'
        };