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              <!-- Read the article about this mixin: sassbreak.com/double-ampersand-mixin -->

<div class="row">
  <div class="col">
    <a href="http://sassbreak.com/double-ampersand-mixin/">Bacon ipsum dolor amet</a> short loin doner jowl brisket drumstick alcatra ground round fatback ham hock sirloin landjaeger corned beef. Meatloaf flank ribeye alcatra frankfurter leberkas.
  <div class="col">
    Ribeye sausage beef ribs shank kielbasa shoulder ball tip turducken boudin landjaeger porchetta.  <a href="http://sassbreak.com/double-ampersand-mixin/">Cow chuck short loin</a> beef shankle jerky bacon picanha filet mignon, prosciutto tongue jowl.
  <div class="col">
    <a href="http://sassbreak.com/double-ampersand-mixin/">Short ribs doner</a> pork loin ribeye picanha fatback biltong. Venison pork chop sirloin boudin turducken, prosciutto ground round pork porchetta spare ribs beef ribs andouille fatback sausage leberkas.
<a class="btn" href="#">Primary Action</a>
<a class="btn" href="#">Secondary Action</a>
              // Article about this mixin: sassbreak.com/double-ampersand-mixin

// MQs
$one-col   : '(min-width: 0) and (max-width: 768px)';
$three-col : '(min-width: 769px)';

// Mixin
@mixin doubly($margin) {
  & + & {
    margin-left: $margin;

// Using it
.col {
  margin-bottom: 20px;
  @media #{$three-col} {
    @include doubly(25px);
    width: 30%;
    float: left;

.btn {
  @include doubly(10px) {
    background: firebrick;
  background: dodgerblue;
  color: white;
  padding: 10px;
  border-radius: 4px;

              // Article about this mixin: sassbreak.com/double-ampersand-mixin
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