Base setup for modular sections and blocks with gulp sass compiler - https://github.com/mcavady/shopify-base
Image tiles that have a number of options to them - fullwidth
Copy following files of the root dir for your shopify project;
/assets/jsm-image-tiles.css
/sections/jsm-image-tiles.liquid
/locals/en.default.schema.json - you will need to add the lines from this to your current translation file, other languages will have to be completed as and when you need ;)
This code was tested in the Default Dawn theme. - at the time of writing