title: Bootstrap Grid Layout without margins
body: <p>Okay, so I found this <a href="https://stackoverflow.com/questions/24659471/nested-rows-with-bootstrap-grid-system">answer</a> but I couldn't get rid of  the margins, so If anyone has the solution for this. 
  I would like to make this grid layout with no margins between each box.</p>
  
  <p><a href="https://i.stack.imgur.com/ux1YE.png" rel="nofollow noreferrer">Grid Layout</a></p>