<div class="slideshow-container">
    <?php
    // GET CUSTOM FIELD TEXT EDITOR ACF
    $slides = get_url_post_custom_field_acf(get_the_ID());
    // START LOOP IMG
    foreach ($slides as $slide) {
    ?>
        <div class="mySlides fade">
            <img src="<?php echo $slide; ?>" alt="" style="width:100%">
        </div>
    <?php } ?>
    <!-- Next and previous buttons -->
    <a class="prev" onclick="plusSlides(-1)">&#10094;</a>
    <a class="next" onclick="plusSlides(1)">&#10095;</a>
</div>