{% if include.selector %}
  {% assign selector = include.selector %}
{% endif %}

{% if include.seed %}
  {% assign seed = include.seed %}
{% endif %}

<script src="https://cdnjs.cloudflare.com/ajax/libs/trianglify/2.0.0/trianglify.min.js"></script>
<script>
  function setRandomBgImage(selector, seed) {
    var element = document.querySelector(selector);
    if (!element) return;
    var pattern = Trianglify({
      width: screen.width,
      height: element.offsetHeight,
      seed: seed
    });
    element.appendChild(pattern.canvas());
  }

  setRandomBgImage('{{ selector }}', '{{ seed }}');
</script>