Shopify liquid fake collection randomizer for related products

related-loop.liquid

<!-- Offset randomizer -->
{% capture current_second %}{{ 'now' | date: "%S" }}{% endcapture %}
{% assign loop_offset = collection.products.size | minus: 4 %}
{% assign current_second_int = current_second | plus: 0  %}

{% if current_second_int < loop_offset %}
  {% assign loop_offset = current_second_int %}
{% endif %}