Converting Classic Themes to Block Theme. How to use block templates parts

Using block templates parts:: Converting Classic Themes to Block Theme

<?php

/**
 * Footer template.
 * Add this to the HTML template in the parts directory in the theme.
 */
if ( function_exists( 'block_template_part' ) ) {
	block_template_part( 'footer-new-blocks' );
}

/**
 * Add theme support for block template parts.
 * Add this to the functions.php in the theme.
 */
function safaris_block_releated_theme_support() {
	add_theme_support( 'block-template-parts' );
}

add_action( 'after_setup_theme', 'safaris_block_releated_theme_support' );