How can I do numeric pagination?

<?php
        $args4 = array('post_type' => 'post', 'showposts' => 99, 'cat' => 23);
        $loop4 = new WP_Query($args4);
        while ($loop4->have_posts()) : $loop4->the_post();
        ?>
            <article class="cover-image ds s-overlay post type-post status-publish format-status has-post-thumbnail">
                <div class="post-thumbnail">
                    <a href="<?php the_permalink(); ?>">
                        <img src="<?php the_post_thumbnail_url(); ?>" alt="">
                    </a>
                </div><!-- .post-thumbnail -->
                <header class="entry-header">
                    <?php echo get_avatar(get_the_author_email(), '100'); ?>

                    <h3 class="entry-title">
                        <a href="<?php the_permalink(); ?>" rel="bookmark">
                            <?php the_title(); ?>
                        </a>
                    </h3>

                    <!-- .entry-meta -->
                </header>
                <!-- .entry-header -->

                <div class="entry-content">
                    <p></p>
                </div><!-- .entry-content -->
                <div class="entry-meta">
                    <a href="<?php the_permalink(); ?>" rel="bookmark">
                        <i class="fa fa-calendar fs-14 color-main"></i>
                        <time class="entry-date published updated" datetime="2018-09-18T15:15:12+00:00"><?php echo get_the_date(); ?></time>
                    </a>
                </div>
            </article><!-- #post-## -->
        <?php endwhile;
        wp_reset_postdata(); ?>


        <nav class="navigation pagination " role="navigation">

        </nav>