What I'm trying to achieve is having margin on my home page. 

What I've tried to do is have a module/theme input a <div class="wrapper"> and </div> in two different places with two different xpaths within one template. The wrapper class has a style.less file with some css in it which should add the margins for me. The problem/error I'm getting is that I can't have unclosed div tags in the xml as it causes an error in odoo. Is there a way around this or a better way of adding margins. 

# Came up with a solution:

Going in before any of the content and inserting a new div which is floating left. Do the same after your content but floating right. Set the sizes and backgrounds of these div's appropriately. Then go into the attributes of your the main content (I had oe_structure eo_empty) and give it a attribute of float middle. Its not ideal but it produces the same effect providing you can get the sizing right and responsive.