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HTML 

              
                <div id="page">
  <div class="shadow-wrapper">
    <div class="shadow">
      <div>&nbsp;</div>
    </div>
  </div>
  <div class="box-wrapper">
    <div class="box">
      <div class="front face"></div>
      <div class="top">&nbsp;</div>
      <div class="bottom">&nbsp;</div>
      <div class="right face"></div>
      <div class="back face"></div>
      <div class="left face"></div>
    </div><!-- end of .box -->
  </div><!-- end of .box-wrapper -->
</div><!-- end of #page -->

<div class="overflow-container">
  <div class="meta">(Text that won't fit in the cube flows here)</div>
  <div class="overflow face">
  </div>
</div>

<div class="instructions">
    This demo is for my <a target="_blank" href="http://fonicmonkey.net/2013/09/23/combining-css-regions-with-transforms-and-animations/">blog post about CSS regions &amp; animation</a>.
  <br/><br/>
  NOTE: A browser with <a target="_blank" href="http://fonicmonkey.net/2013/09/09/css-regions-and-why-youll-be-using-them-before-you-know-it/#browsersupport">support for CSS Regions</a> is required. 
</div>

<div class="content">
  <strong>Hello and welcome</strong> to a CSS regions example.
  <p>
  I'm <a target="_blank" href="http://fonicmonkey.net/">Lee Mallabone</a> and I created this demo as a fun example of what happens when you combine CSS regions with transforms and animation.
  <p>
    Thanks to <a href="https://codepen.io/cliffpyles/pen/LHlqa">Cliff Pyles</a> and <a href="http://davidwalsh.name/css-cube">David Walsh</a> for the gorgeous CSS cube that's spinning here.
  <p>
    To see the region support really shine, have a look at the CSS section in the codepen editor and update the <tt>$cube-size</tt> variable. Try changing it to something like 280px and watch how the text flows differently (but appropriately) into the cube faces.
    
    <p>
      Change the font-size on the body style block too, and see how everything still flows across each cube face regardless of spacing, line breaks or paragraphs.
      <p>

What now follows is some boilerplate text to allow the prose to flow downwards into the overflow div I've created below.

<p>    
    2.3. Named flows

A named flow is the ordered sequence of content associated with a flow with a given identifier. Contents in a named flow are ordered according to the document order.

Content is placed into a named flow with the ‘flow-into’ property. The content in a named flow is laid out in the region chain that is associated with this named flow using the ‘flow-from’ property.

Content from a named flow is broken up between regions according to the regions flow breaking rules.

A named flow is created when some content is moved into the flow with the given identifier or when at least one CSS Region requests content from that flow.

2.4 
</div>
!

CSS 

              
                @import "compass/css3";

$cube-size: 220px;

.box, .shadow {
  -webkit-animation: spin 45s infinite linear;
}

body {
  background-color: #333;
  font-family: Optima, Helvetica;
  font-size: 18px;
}

.content {
  -webkit-flow-into: myipsum;
  flow-into: myipsum;
}

.face {
  -webkit-flow-from: myipsum;
  flow-from: myipsum;
  box-sizing: border-box;
  padding: 18px;
}

.overflow-container {
  width: 90%;
  height: 200px;
  position: absolute;
  top: $cube-size + 150px;
  margin-left: 20px;
  color: black;
  background-color: #ccc;
  padding: 25px;
  box-shadow: inset 0 0 100px #666;
  overflow: scroll;
  .meta {
    position: absolute;
    right: 0;
    top: 0;
    padding: 5px 8px;
    color: #ddd;
    background-color: green;
  }
  .face {
    opacity: .7;
  }
}

.instructions {
  position: absolute;
  width: 120px;
  padding: 10px;
  right: 0;
  top: 0;
  font-size: 12px;
  background-color: white;
}

#page {
  position: absolute;
  text-align: center;
  left: 35%;
  top: 50px;
  color: #222;
}

.box-wrapper {
  perspective: 800px;
  perspective-origin: 50% 100px;
}

.box {
  position: relative;
  width: $cube-size;
  transform-style: preserve-3d;
}
.box p {
  padding: 40px 0;
}
.box div {
  outline: 1px solid #999;
  position: absolute;
  width: $cube-size;
  height: $cube-size;
  opacity: 0.98;
  box-shadow: inset 0px 0px ($cube-size / 2) #555;
}

.back {
  transform: translateZ(-$cube-size / 2) rotateY(180deg);
  background-color: #eee;
}
.right {
  transform: rotateY(-270deg) translateX($cube-size / 2);
  transform-origin: top right;
  background-color: #ddd;
}
.left {
  transform: rotateY(270deg) translateX(-$cube-size / 2);
  transform-origin: center left;
  background-color: #ddd;
}
.top {
  transform: rotateX(-90deg) translateY(-$cube-size / 2);
  transform-origin: top center;
  background-color: #fafafa;
}
.bottom {
  transform: rotateX(90deg) translateY($cube-size / 2);
  transform-origin: bottom center;
  background-color: #bbb;
}
.front {
  transform: translateZ($cube-size / 2);
  background-color: #eee;
}


@keyframes spin {
  from { transform: rotateY(360deg); }
  to { transform: rotateY(0); }
}

.left p { color: #27a05c; }
.right p { color: #27a05c; }
.front p { color: #27a05c; }
.back p { color: #27a05c; }

.shadow-wrapper {
  perspective: 800px;
  perspective-origin: 50% $cube-size / 2;
/*  -webkit-perspective: 800px;
  -webkit-perspective-origin: 50% 100px;*/
}

.shadow {
  position: relative;
  width: $cube-size;
  transform-style: preserve-3d;
  div {
    position: absolute;
    width: $cube-size;
    height: $cube-size;
    top: 2px;
    opacity: 0.98;
    box-shadow: 0px 0px $cube-size / 2 #000;
    transform: rotateX(90deg) translateY($cube-size / 2);
    transform-origin: bottom center;
  }
}
!

JS
!
999px

Console