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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <div id="root" class="pink-box k-centered k-container">
  <div class="k-row red-box">
    <div class="k-col k-c-2-xs k-c-4-m yellow-box k-center">A</div>
    <div class="k-col k-c-2-xs k-c-4-m yellow-box k-center">B</div>
    <div class="k-col k-c-2-xs k-c-4-m yellow-box k-center">C</div>
    <div class="k-col k-c-2-xs k-c-4-m yellow-box k-center">D</div>
  <div class="k-row blue-box">
    <div class="k-col k-c-3 pink-box k-center">A</div>
    <div class="k-col k-c-3 pink-box k-center">B</div>
    <div class="k-col k-c-3 pink-box k-center">C</div>
  <div class="k-row green-box">
    <div class="k-col k-c-12 yellow-box k-center">A</div>
    <div class="k-col k-c-12 yellow-box k-center">B</div>
    <div class="k-col k-c-12 yellow-box k-center">C</div>
    <div class="k-col k-c-12 yellow-box k-center">D</div>
    <div class="k-col k-c-12 yellow-box k-center">E</div>
    <div class="k-col k-c-12 yellow-box k-center">F</div>
    <div class="k-col k-c-12 yellow-box k-center">G</div>
    <div class="k-col k-c-12 yellow-box k-center">H</div>
    <div class="k-col k-c-12 yellow-box k-center">I</div>
    <div class="k-col k-c-12 yellow-box k-center">J</div>
    <div class="k-col k-c-12 yellow-box k-center">K</div>
    <div class="k-col k-c-12 yellow-box k-center">L</div>
  <div id="pyramid" class="k-container k-centered red-box"></div>
              // Debug stuff
  background red
  background pink
  background yellow
  background green
  background blue
  padding 0
  margin 0

  min-height 90px
  padding 30px
  background teal
  padding 0
  margin 0
// Variables
$GRID_WIDTH = 1200px
$MAX_COLS = 12

// For now only two breakpoints are fine
  'xs': 0,
  's': 400,
  'm': 600,
  'l': 800,
  'xl': 1080

// Mixins
    display table
    clear both
    content ''

  w = unit(gutterWidth * n, px)
  width "calc(calc(100% - %s) / %s)" % (w n)
  margin-right (gutterWidth / 2)
  margin-left (gutterWidth / 2)
  float left

// Rules
  box-sizing border-box

  box-sizing inherit

// Utility classes
  text-align center

  width 100%
  height 100%
  display block
  max-width $GRID_WIDTH
  margin-left auto
  margin-right auto

  max-width $GRID_WIDTH

  // Make standard column defs
  for n in (1..$MAX_COLS)
      columnProperties(n, $GUTTER_WIDTH)
  // Make breakpoint specific column defs
  for bk, val in $BREAKPOINTS
    for n in (1..$MAX_COLS)
      @media (min-width: unit(val, px))
          columnProperties(n, $GUTTER_WIDTH)
              const LETTERS = 'ABCDEFGHIJKL';
const numbers = [];

let i = 0;
while (i < 12) {

const Cell = ({ size, color }) => (
  <div className="adf"></div>
const Pyramid = () => {
  return <div className="pyramid-wrapper">
      numbers.map((n) => {
        return <div className="k-row" key={ `row-${n}`}>
            numbers.map((m) => {
              if (m < n) {
                return (
                    className="k-col k-c-12" 
                    key={ `cell-${n}-${m}`}></div>
              return (
                  className="k-col k-c-12 yellow-box"
                  key={ `cell-${n}-${m}` }
                    >{ LETTERS[m - n]}</div>

ReactDOM.render(<Pyramid />, document.getElementById('pyramid'));
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