My layout consists of 3 columns arranged like this:
<div class="container-fluid">
<h1>Hello World!</h1>
<p>Resize the browser window to see the effect.</p>
<div class="row">
<div class="col-sm-3">left column</div>
<div class="col-sm-6">center column</div>
<div class="col-sm-3">right column</div>
</div>
</div>
Now, I want to rearrange them using push and pull. The goal is to have the center column at the top, with the other columns having a size of 6 each.