themes-wordpress/loudness/patterns/illustration-1.php

<?php
/**
 * Title: Illustration 1
 * Slug: loudness/illustration_1
 * Categories: illustrations
 */
?>
<!-- wp:image {"align":"full","sizeSlug":"full","linkDestination":"none"} -->
<figure class="wp-block-image alignfull size-full">
	<img src="<?php echo esc_url( get_stylesheet_directory_uri() ) . '/assets/illustrations/illustration-1.svg'; ?>" />
</figure>
<!-- /wp:image -->