wordpress post gallery test

Hi all,

I’m new to wordpress and am wondering how I can get a post gallery working in my php files. As it is currently I have the following code:

<?php
$gallery_atts = array (
'post_parent' => $post->ID,
'post_mime_type' => 'image'

);

$gallery_images = get_children($gallery_atts);

if (!empty($gallery_images)) {
$gallery_count = count($gallery_images);
$first_image = array_shift($gallery_images);
$display_first_image = wp_get_attachment_image($first_image->ID);
?>	

<figure class="article-preview-image">
<a href="<?php the_permalink(); ?>" <?php echo $display_first_image; ?> </a> </figure>
<?php }
?>

This is all for a content gallery php file I’m making for a personal wordpress theme. I’ve been following tutorials and following some intuition, but I’ve run into a wall here as I think some of the sources I’m using may be outdated. Any help is appreciated, thanks!