Jump to next section in while loop - php

Question

OK, this is a bit complicated so Ill try my best to explain it:
I have a while loop which has a next link, before I just had it in standard html, so it was farely simple, on click of the class 'arrow' it would just to the next section e.g:
$i = 0;
while ( have_rows('sections') ) : the_row();
$sectionName = $i++;
?>
<section id="<?php echo $sectionName; ?>" class="full-bg-image" style="background-image: url('<?php the_sub_field('section_image'); ?>')">
<div class="image divider" id="partnersImg" style="background-image: url('<?php the_sub_field('section_image'); ?>')">
<div class="wrapper">
<div class="overlay" style="color: <?php the_field('section_text_colour','options'); ?>">
<?php the_sub_field('divider_text'); ?>
</div>
</div>
</div>
<div class="sectionContent">
<div class="wrapper">
<div class="centerContent">
<div class="contentWrapper">
<div class="text animation-element" data-sr="enter center wait 0.5s, no reset" style="background-color: <?php the_field('text_block_bg_colour','options'); ?>; color: <?php the_field('text_block_text_colour','options'); ?>">
<?php the_sub_field('section_text'); ?>
<div class="arrowContainer"></div>
</div>
<div class="clr"></div>
</div>
</div>
</div>
</div>
</section>
<?php endwhile;
The sectionName variable is set for each item name that is added in the wordpress admin however the issue comes when my above code shows and the anchor is linking too itself and not the next section, I would like to know how to link it to the next section and if its the last section then to have a anchor which links to the first.
<section id="0">
<div class="arrowContainer"></div>
</section>
<section id="1">
<div class="arrowContainer"></div>
</section>
<section id="2">
<div class="arrowContainer"></div>
</section>
<section id="3">
<div class="arrowContainer"></div>
</section>
In this case I am using Advanced Custom Fields repeater and not posts.