bulma/docs/_includes/index/sponsor.html

<div class="section bd-partners">
  <div class="container">
    <div class="bd-partners-list">
      <div class="bd-partner bd-is-sponsor">
        <p class="bd-partner-title">Sponsors</p>
        <div class="bd-partner-sponsors">
          <a href="https://themeisle.com/" target="_blank" rel="nofollow">
            <img src="{{ site.url }}/images/sponsors/themeisle.png" alt="themeisle logo" width="160" height="40">
          </a>
          <a href="https://chainaxe.io/" target="_blank" rel="nofollow">
            {%
              include elements/responsive-image.html
              path="sponsors/chainaxe"
              extension="png"
              alt="chainaxe logo"
              width="85"
              height="60"
            %}
          </a>
          <a href="https://www.keycdn.com/" target="_blank" rel="nofollow">
            {%
              include elements/responsive-image.html
              path="sponsors/keycdn"
              extension="png"
              alt="keycdn logo"
              width="150"
              height="43.5"
            %}
          </a>
          <a href="http://tooltwist.com/" target="_blank" rel="nofollow">
            {%
              include elements/responsive-image.html
              path="sponsors/tooltwist"
              extension="png"
              alt="tooltwist logo"
              width="160"
              height="51"
            %}
          </a>
        </div>
      </div>

      <div class="bd-partner bd-is-carbon">
        <p class="bd-partner-title">Ads via Carbon</p>
        <div class="bd-partner-carbon">
          {% include elements/carbon.html %}
        </div>
      </div>
    </div>
  </div>
</div>