how to show output of this code

i have the following code and i want to know output of these operations, i just want my matlab to show the last result

% Author: MLAB Innovation
%  wtmark function performs watermarking in DCT domain
%  It processes the image into 64x64 blocks.

% im     = Input Image
% wt     = Watermark Image/ Image to hide
% embimg = Output Embedded image

% Checking Dimnesions
clear all;
clc;

    im=imread('lena.png');    % original image
    wt=imread('w.jpg');    % images used for watermark/hide 
    hold on;
    if length(size(im))>2  % check original image is RGB or gray
        im=rgb2gray(im);   % convert into gray for further processing
    end

resize the image such that it can be breaked into 8x8 blocks easily

    im = imresize(im,[512 512]); % Resize original image so that to break into 8x8 blocks
    watermark = imresize(im2bw((wt)),[32 32]);% Resize and Change in binary to fit into 8x8 block

    x={};  % empty cell which will consist all blocks or subimage or original image

this will break the image into 8x8 blocks and than take DCT or those blocks

    dct_img=blkproc(im,[8,8],@dct2); % DCT of image using 8X8 block
    m=dct_img; % DCT transformed original image in which watermark will be inserted 

    k=1; dr=0; dc=0; 
    % dr is to address 1:8 row every time for new block in x
    % dc is to address 1:8 column every time for new block in x
    % k is to change the no. of cell

    %%%%%%%%%%%%%%%%%To divide original image in to 64 sub images of 64X64 blocks each %%%%%%%%%%%%%%%%%%
    for ii=1:64:512              % To address row -- 64X64 blocks of image
        for jj=1:64:512          % To address columns -- 64X64 blocks of image
            for i=ii:(ii+63)     % To address rows of blocks
                dr=dr+1;
                for j=jj:(jj+63) % To address columns of block
                    dc=dc+1;
                    z(dr,dc)=m(i,j);  
                end
                dc=0;  
            end
            x{k}=z; k=k+1;  % concatinate the total 4096 sub images of 8x8 blocks into cell 
            z=[]; dr=0;    % clear z and dr for next round
        end
    end
    nn=x; 
    % save x in nn it consist of DCT reansformed original image into cell of 
    % 64 sub images having 64x64 blocks of size each 

    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%To insert watermark in to  blocks%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    i=[]; j=[]; w=1; wmrk=watermark; welem=numel(wmrk);  % welem - no. of elements in watermark image
    for k=1:64     
        kx=(x{k});   % Extracting DCT transformed original block of 8x8 size into kx for processing
        for i=1:8    % To address row of block
            for j=1:8 % To adress column of block
                if (i==8) && (j==8) && (w<=welem) % Eligiblity condition to insert watremark
                 % i=1 and j=1 - means embedding element in first bit of every 8x8 block                             

                 if wmrk(w)==0      % if watermark  pixel is black   
                        kx(i,j)=kx(i,j)+35;  % raise original DCT image pixel by watermark values 35 
                    elseif wmrk(w)==1    % if watermark  pixel is white
                        kx(i,j)=kx(i,j)-35;  % down original DCT image pixel by watermark values 35 
                     end                                
                end            
            end        
        end
        w=w+1;
        x{k}=kx; kx=[]; % Watermark value will be replaced in block
    end     

    %%%%%%%%%%%%%%%%%%%%%%%%%%%%To recombine 64x64x64 cells in to original watermarked image of 512x512 size %%%%%%%%%
    i=[]; j=[]; data=[]; count=0;
    embimg1={}; % Changing complete row cell of 4096 into 64 row cell 
    for j=1:8:64
        count=count+1;
        for i=j:(j+7)
            data=[data,x{i}];
        end
        embimg1{count}=data;
        data=[];
    end

    % Change 8 row cell in to particular columns to form image
    i=[]; j=[]; data=[]; 
    embimg=[];  % final watermarked image 
    for i=1:8
        embimg=[embimg;embimg1{i}];   % Final watermarked image
    end
    embimg=(uint8(blkproc(embimg,[8 8],@idct2)));  % inverse DCT transform
    imwrite(embimg,'out_new.jpg')  % save watermarked image
    imshow('out_new.jpg')