bulma/docs/_includes/footer/support.html

<div class="bd-footer-support">
  <h4 class="bd-footer-title">
    <strong>Support</strong> Bulma <span class="bd-emoji-bis">😃</span>
  </h4>

  <div class="bd-footer-donations columns is-multiline">
    <div class="bd-footer-donation column">
      <p class="bd-footer-donation-title">
        <strong>One-time</strong> donation
      </p>
      <div class="bd-footer-donation-action">
        <form class="paypal-form" action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top">
          <input type="hidden" name="cmd" value="_s-xclick">
          <input type="hidden" name="hosted_button_id" value="8WMKYSRFN6A78">
          <input type="image" src="{{site.url}}/images/paypal-donate.png" border="0" name="submit" alt="PayPal – The safer, easier way to pay online." height="30">
          <img alt="" border="0" src="https://www.paypalobjects.com/en_GB/i/scr/pixel.gif" width="1" height="1">
        </form>
      </div>
    </div>

    {% if site.data.sponsors.footer.size > 0 %}
      <div class="bd-footer-donation column">
        <p class="bd-footer-donation-title">
          Visit our <strong>Sponsors</strong>
        </p>

        <div class="bd-footer-donation-items">
          {% for sponsor_id in site.data.sponsors.footer %}
            {% include elements/sponsor-item.html
              sponsor_id=sponsor_id
              classname="bd-footer-sponsor"
              %}
          {% endfor %}
        </div>
      </div>
    {% endif %}

    <div class="bd-footer-donation column">
      <p class="bd-footer-donation-title">
        <strong>Monthly</strong> donation
      </p>
      <div class="bd-footer-donation-action">
        {% include elements/sponsor-button.html %}
      </div>
    </div>
  </div>
</div>