Liquid: Siteleaf Next Navigation

gistfile1.liquid

{% if next.pages == empty %}
  <p class="next">Next: <a href="{{ next.url }}">{{ next.title }}</a></p>    
{% elsif next.pages.size > 0 %}
  {% for page in next.pages limit:1 %}
    <p class="next">Next: <a href="{{ page.url }}">{{ page.title }}</a></p>    
  {% endfor %}
{% elsif parent.next.pages == empty %}
  <p class="next">Next: <a href="{{ parent.next.url }}">{{ parent.next.title }}</a></p> 
{% elsif parent.next.pages.size > 0 %}
  {% for page in parent.next.pages limit:1 %}
  <p class="next">Next: <a href="{{ page.url }}">{{ page.title }}</a></p>    
  {% endfor %}
{% else %}
  <p class="next">Next: <a href="/">Home</a></p>
{% endif %}