I need to create a layout using bootstrap 3. My layout should have something similar to this -

Here, I can create red column but others have some confusing.
This is my code so far -
<div class="container">
<div class="row">
<section class="col-sm-5">
</section>
<section class="col-sm-7">
</section>
</div> <!-- /.row -->
</div> <!-- /.container -->
Can anybody tell me how I create other columns using bootstrap?