You have to loop through that part of the code to get more posts:
$args = array(
'posts_per_page' => -1
);
$the_query = new WP_Query( $args );
<?php if ($the_query->have_posts()) : ?>
<?php while ($the_query->have_posts()) : $the_query->the_post(); ?>
...<your code>...
<?php endwhile; ?>
<?php endif; ?>