How can I turn my liquid code into a theme section for brand selection?

Shopify Plus
1

Hi

Please can someone help I have the below liquid code and I want to make the theme section.

So I can select a brand from the vendor list add a banner and link to the banner

Below liquid code help to hide the banner at end date

gary07_0-1664020129747.png
gary07_0-1664020129747.png1680×907 118 KB

{% assign metafield_start_date = product.metafields.timer_test.fr-date.value | date: “%s” %}
{% assign metafield_end_date = product.metafields.timer_test.to-date.value | date: “%s” %}
{% assign current_date = “now” | date: “%Y-%m-%d” | date: “%s” %}
{% assign metafield_value = product.metafields.timer_test.image.value %}

{% if current_date >= metafield_start_date and current_date <= metafield_end_date and metafield_value != blank %}



{% endif %}

I want to make a page like this

I have made Metafeild for Banner Image and Banner URL as above

Please can someone help me?