package superModule;

my $self;
sub new(){
 my $class=shift;
 my %params=@_;
 $self=(bless({"dbh"=>$params{"DB"}},$class));
 return $self;
}

sub printSuper(){
print "Super module:".$self->{dbh}."\n";
}

package myModule;
@ISA=(superModule);

my $self;

sub new(){
my $class=shift;
%params=@_;
my $parentObj=superModule->new(%params);
$self=(bless({"file_name"=>$params{"file name"}},$class));
$self->{"parent"}=$parentObj;
return $self;
}


sub printFile(){
print "My file name from file obj ".$self->{file_name}."\n";
}
package yourModule;

@ISA=(superModule);

my $self;

sub new(){
my $class=shift;
%params=@_;
my $parentObj=superModule->new(%params);
$self=bless({"block_name"=>$params{"block name"}},$class);
$self->{"parent"}=$parentObj;
return $self;
}


sub printBlock(){
print "My Block name from block obj ".$self->{block_name}."\n";
}
return 1;

use myModule;
use yourModule;

my %f_params=(DB=>"File DB value","file name"=>"Lisa");

my %b_params=(DB=>"Block DB vlaue","block name"=>"Pisa");

my $file_obj=myModule->new(%f_params);
my $block_obj=yourModule->new(%b_params);
$file_obj->printSuper();
$file_obj->printFile();
$block_obj->printSuper();
$block_obj->printBlock();