Achieve a square aligned with 3 rows with bootstrap - html

Question

I'm trying to get this result with boostrap :
The idea would be that : the black square stay as a square, even with the right "rows" being resized (on mobile for example)
And the red rows would be having the same height/width (I failed that on the image, just a quick paint mockup)
I'd love to show you some code that would be a starting point but after a few hours I'm unable to achieve this effect...
I found that template that use this kind of structure :
Gridus

Answer 1

Using flexbox as a wrapper.
* {
box-sizing: border-box;
}
.flexbox {
display: flex;
justify-content: left;
align-items: flex-start;
}
.col-md-10 {
border: thin solid darkgray;
max-height: 50px;
overflow: hidden;
height: 50px;
width: 100%;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="row nopadding flexbox">
<a href="#">
<div class="col-md-4 vc-photo photo-01"><img src="http://placehold.it/150" /></div>
</a>
<div class="col-md-8 nopadding">
<div class="row nopadding">
<div class="col-md-10">
<p>Bla</p>
</div>
</div>
<div class="row nopadding">
<div class="col-md-10">
<p>Bla</p>
</div>
</div>
<div class="row nopadding">
<div class="col-md-10">
<p>Bla</p>
</div>
</div>
</div>
</div>

Answer 2

You mean something like this? I didn't bother with the borders, but I can put it if you like
.left-div {
background-color: pink;
height: 120px;
width: 120px;
float:left;
}
.right-div {
background-color: red;
height: 120px;
float:left;
}
.col-xs-12{
height: 40px;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="container">
<div class="row">
<div class="left-div">Column 1</div>
<div class="right-div">
<div class="row">
<div class="col-xs-12">Row 1</div>
<div class="col-xs-12">Row 2</div>
<div class="col-xs-12">Row 3</div>
</div>
</div>
</div>
</div>