pen/functions.php

<?php
/**
 * The functions.php file.
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package Pen
 */

$template_directory = get_template_directory();
require_once $template_directory . '/include/color.php';
require_once $template_directory . '/include/general.php';
require_once $template_directory . '/include/compress.php';
require_once $template_directory . '/include/sanitize.php';
// require_once $template_directory . '/include/typography.php';
require_once $template_directory . '/include/html.php';
require_once $template_directory . '/include/configure.php';
require_once $template_directory . '/include/assets.php';
require_once $template_directory . '/include/sidebars.php';
require_once $template_directory . '/include/widgets.php';
require_once $template_directory . '/include/content.php';
require_once $template_directory . '/include/customize.php';