How to Build Your First Shopify Section Block: Call To Action - https://www.shopify.com/partners/blog/shopify-section-block

how-to-build-your-first-section-block-call-to-action.liquid

<hr>
<div id="section-cta">
  <div class="section-header text-center">
    <h3> {{ section.settings.text-box }} </h3>
  </div>

  {% for block in section.blocks %}  
  <div class="btn" id="call-to-action">   
    <a href="{{ block.settings.link }}" class="btn">{{ block.settings.linktext }}</a>
  </div> 
  {% endfor %}

</div>  
<hr>
{% schema %}
{
  "name": "CTA Blocks",
	"max_blocks": 3,
  "settings": [
    {
      "id": "text-box",
      "type": "text",
      "label": "Heading",
      "default": "Title"
    }
  ],
  "blocks": [
    {
      "type": "select",
      "name": "Add Button",
      "settings": [
        {
          "id": "link",
          "type": "url",
       		"label": "Button link"
        },
        {
          "id": "linktext",
          "type": "text",
          "label": "Button text",
          "default": "Click here"
        }
      ]
    }
  ],
  "presets": [
    {
      "name": "Call to Action Blocks",
      "category": "CTA button",
      "blocks": [
        { 
          "type": "select"
        },
        {
          "type": "select"
        }
      ]
    }
  ]
}
{% endschema %}

{% stylesheet %}
{% endstylesheet %}

{% javascript %}
{% endjavascript %}