Display Image in NextGen Gallery one by one in WordPress Plugin

Hi I have used the NextGen Gallery Plugin in WordPress. Here I make a gallery and then in Custom Post Type UI Plugin I have one field which is of NextGen Gallery.

Now I want to show all the images which are in that field in my custom template. Any help would be appreciated. Here is the sample code what I am doing

<?php
            $args1 = array(
                'post_type' => 'categories'
            );
            $the_query1 = new WP_Query( $args1 );
        ?>

        <?php if ( have_posts() ) : while ( $the_query1->have_posts() ) : $the_query1->the_post(); ?>

            <div class="conbg"><a href="<?php the_permalink(); ?>"><p class="con-hadin1"><?php the_field('name'); ?></p></a></div>
            <img src="<?php  the_field('gallery'); ?>"  />
            /* Here i want to display all the images */  

        <?php endwhile; else: ?>
        <p>There are no post or pages here.</p>
        <?php endif; ?>