Bootstrap Column in column - html

Question

This is visual demonstration: Image
I'm trying to put in my laptop column(col-md-8) second column, but when I try, the other one went under the column of the laptop, how can I put a second(col-md-6)column inside a laptop column, and that column laptop still has its full size.

Answer 1

Do you want like this? It's a very short and a messy description you have. So I hope i'm right.
<div class="row">
<div class="col-md-8 col-sm-12">
<div class="row">
<div class="col-md-6 col-sm-6">
Laptop Image
</div>
</div>
</div>
</div>
"col-md-8 col-sm-12" classes will keep your column content as you like in tablet view+desktop view but when it becomes smaller like smartphone view, it will expand to the column to full width and you will still able to see your stuff inside of the laptop column.
Please read the bootstrap documentation from here. Anything else you want quick google will fix your issues or we're here at stackoverflow to help you out. :)
Update
This is what you want isn't it?
https://jsfiddle.net/5jrt314r/2/
Now Whatever goes inside of that .inside class will depend on the laptop image size you have. It will automatically horizontally and vertically center based on the .laptop class you have.

Answer 2

You said you want it responsive so you have to:
Keep your laptop element aspect ratio the same as the image.
Have a screen element that will always fill laptop's screen even if laptop image size changes due to it filling parent element.
If I am right you want this:
HTML:
<div class="row">
<div class="col-xs-8 laptop">
<div class="row">
<div class="col-xs-offset-3 col-xs-9 screen">
This column need to go in laptop screen
</div>
</div>
</div>
</div>
CSS:
.laptop {
background: url('http://devel0p.com/damir/wp-content/themes/helium/images/portofolio/macbook.png');
background-size: 100%;
background-repeat: no-repeat;
/* Padding will keep element aspect ratio so we always show image in it's original aspect ratio */
padding-bottom: 89.32%;
}
.screen {
background: red;
/* Make sure this element is always the size of the screen */
padding-bottom: 64%;
}
I calculated image aspect ratio to be 89.32~% by dividing width by height which is respectively 2084px and 2333px.
Here is a codepen example http://codepen.io/anon/pen/aNqKZL
UPDATE
In the first example .screen element would go beyond laptop screen because of it being stretched by it's content. Here is a version that deals with it http://codepen.io/anon/pen/qZxKRo