Custom section Shopify

<div class="site-spacer page-width" style="height:{{section.settings.spacer-height}}px;">
</div>
{% schema %}
{
   "name":"Spacer",
   "settings":[
      {
         "type":"number",
         "id":"spacer-height",
         "default": 100,
         "label":"Height in pixels"
      }
   ],
   "presets": [
   {
     "name": "Spacer",
     "settings": {
        "spacer-height": 100
      }
   }
   ]
}
{% endschema %}