WordPress custom field repeater

<?php if( have_rows('slider') ): ?>

                <?php while( have_rows('slider') ): the_row();

                    // vars
                    $image = get_sub_field('image');
                    $heading = get_sub_field('heading');
                    $disclaimer = get_sub_field('title');

                    ?>

                    <div class="slider-bg"
                         style="background: url( <?php echo $image['url'] ?>); -webkit-background-size: cover; background-size:  cover;">
                        <div class="dark-mask flex-cntr"><h2 class="animated slideInUp"><?php echo $heading?></h2>
                            <div class="disclaimer animated slideInUp"><?php echo $disclaimer?></div>
                        </div>
                    </div>

                <?php endwhile; ?>

        <?php endif; ?>