Footer for jekyll sites, that iterates all pages (here with css classes for materializecss)

footer.html

<footer class="page-footer black">
    <div class="container">
        <div class="row">
            <div class="col l4 s12">
                <h5>{{ site.title }}</h5>
                <p class="grey-text text-lighten-1 hide-on-med-and-down">{{ site.description }}</p>
            </div>
            <div class="col l2 s12">
            <p><!-- some icons -->
              <a href="#" class="waves-effect"><img class="responsive-img" src="{{ site.baseurl }}/images/icon.png" alt=""></a>
              <a href="#" class="waves-effect"><img class="responsive-img" src="{{ site.baseurl }}/images/icon.png" alt=""></a>
            </p>
            </div>
<div class="col l2 s6">
<ul>
{% assign c = 0 %}{% assign d = 1 %}{% for p in site.pages %}{% if p.title != 'Error 404' %}{% assign u = p.url %}{% assign usize = u | size | minus: 1 %}
{% assign u =  u | slice: usize %}{% if u != '/' and u != 'l' %}{% assign x = p.url | append: '.html' %}{% else %}{% assign x = p.url %}{% endif %}{% if d == 0 %}
</ul>
</div>
<div class="col l2 s6">
<ul>
<li>
    <a href="{{ site.baseurl }}{{ x }}" class="grey-text text-lighten-1">{{ p.title }}</a>
</li>
{% else %}
<li>
    <a href="{{ site.baseurl }}{{ x }}" class="grey-text text-lighten-1">{{ p.title }}</a>
</li>
{% endif %}{% assign c=c | plus:1 %}{% assign d=c | modulo:5 %}{% endif %}{% endfor %}
</ul>
</div>
        </div>
    </div>
<div class="footer-copyright">
    <div class="container center-align">
      &copy; {{ site.copyright }}<br>
    </div>
</div>
</footer>
{% if site.g_analytics %}
<script>
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
  ga('create', '{{ site.g_analytics }}', 'auto');
  ga('send', 'pageview');
</script>
{% endif %}