I'm struggling to correctly stack my columns using bootstrap. The image shows that I need the black box to be positioned below the green box, but I can't seem to get it right:
https://i.sstatic.net/7bvN6.png
This is the code I have been using:
<div class="container-fluid">
<div class="row">
<div class="col-lg-6 col-md-12" style="background-color:blue; height:600px;"></div>
<div class="col-lg-6 col-md-12 " style="background-color:green; height:300px;"></div>
<div class="col-lg-6 col-md-12" style="background-color:black; height:300px;"></div>
</div>
</div>
I'd appreciate any help on figuring out where I may have made a mistake.
Thank you