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HTML

              
                <div class="container-sm">
  <div class="demo-row">
    <div class="box gingham">

    </div>
  </div>
  <div class="demo-row">
    <div class="box guides">

    </div>
  </div>
  <div class="demo-row">
    <div class="box blueprint">

    </div>
  </div>
  <div class="demo-row">
    <div class="box polka-dot">

    </div>
  </div>
  <div class="demo-row">
    <div class="box checkerboard">

    </div>
  </div>
  <div class="demo-row">
    <div class="box checkerboard-svg">

    </div>
  </div>
  <div class="demo-row">
    <div class="box cicada-stripes"></div>
  </div>
  
  <div class="demo-row">
    <div class="box gradient-border gradient-border-1">
      Linear-gradient background-image
    </div>
  </div>
  
  <div class="demo-row">
    <div class="box gradient-border gradient-border-2">
      Linear-gradient background-image
    </div>
  </div>
  
  <div class="demo-row">
    <div class="box gradient-border-image">
      Linear-gradient border-image
    </div>
  </div>
  
  <div class="demo-row">
    <div class="box continuous-borders">
      Hello, lucy!
    </div>
  </div>

  <div class="demo-row">
    <div class="box continuous-borders marching">
      Hello, lucy!
    </div>
  </div>
  <div class="demo-row">
    <div class="box marching-ants">
      Hello, lucy!
    </div>
  </div>
  <div class="demo-row">
    <div class="box footnote">
      <sup>1</sup>This is a footnote.
    </div>
  </div>
</div>
              
            
!

CSS

              
                .box {
  height: 150px;
  padding: 10px;
}

.gingham {
  @bg: rgba(200, 0, 0, .5);
  @width: 15px;
  background-image: linear-gradient(@bg 50%, transparent 0),
    linear-gradient(90deg, @bg 50%, transparent 0);
  background-size: @width*2 @width*2;
}

.guides {
  @color: white;
  @width: 30px;
  background-color: #58a;
  background-image: linear-gradient(@color 1px, transparent 0),
    linear-gradient(90deg, @color 1px, transparent 0);
  background-size: @width @width;
}

.blueprint {
  @color: hsla(0, 0%, 100%, .3);
  @accent-color: white;
  @width: 10px;
  background-color: #58a;
  background-image: linear-gradient(@color 1px, transparent 0),
    linear-gradient(90deg, @color 1px, transparent 0),
    linear-gradient(@accent-color 2px, transparent 0),
    linear-gradient(90deg, @accent-color 2px, transparent 0);
  background-size: @width @width, @width @width,
    @width*5 @width*5, @width*5 @width*5;
}

.polka-dot {
  @color: white;
  @size: 30px;
  background-color: pink;
  background-image: radial-gradient(@color 20%, transparent 0),
    radial-gradient(@color 20%, transparent 0);
  background-size: @size @size;
  background-position: 0 0, @size/2 @size/2;
}

.checkerboard {
  @size: 30px;
  @bg: rgba(0, 0, 0, .25);
  background-color: #eee;
  background-image: linear-gradient(45deg, @bg 25%, transparent 0, transparent 75%, @bg 0),
    linear-gradient(45deg, @bg 25%, transparent 0, transparent 75%, @bg 0);
  background-position: 0 0, @size/2 @size/2;
  // http://play.csssecrets.io/test-conic-gradient
  // background-image: repeating-conic-gradient(#bbb 0, #bbb 25%, #eee 0, #eee 50%);
  background-size: @size @size;
}
.checkerboard-svg {
  background: #eee url('data:image/svg+xml,\
    <svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" fill-opacity=".25" >\
    <rect x="50" width="50" height="50" />\
    <rect y="50" width="50" height="50" />\
    </svg>');
  background-size: 30px 30px;
}

.cicada-stripes {
  background-color: hsl(20, 40%, 90%);
  background-image: linear-gradient(90deg, #fb3 11px, transparent 0),
    linear-gradient(90deg, #ab4 23px, transparent 0),
    linear-gradient(90deg, #655 41px, transparent 0);
  background-size: 41px 100%, 61px 100%, 83px 100%;
}

.gradient-border {
  position: relative;
  background-color: #fff;
  background-clip: content-box;
  &::before {
    content: ''; position: absolute; z-index: -1;
    top: 0; right: 0; bottom: 0; left: 0;
  }
}
.gradient-border-1::before {
  background-image: linear-gradient(135deg, hsl(9, 100%, 64%), hsl(40, 100%, 64%));
}
.gradient-border-2::before {
  background-image: linear-gradient(hsl(9, 100%, 64%), hsl(51, 100%, 50%));
}
.gradient-border-image {
  border: 10px solid;
  border-image: linear-gradient(45deg, hsl(120, 100%, 50%), hsl(180, 100%, 50%)) 1 1 stretch;
}

.continuous-borders {
  border: 1em solid transparent;
  background: linear-gradient(#fff, #fff) padding-box,
    repeating-linear-gradient(-45deg,
      #ff5d6c 0,
      #ff5d6c 12.5%,
      transparent 0,
      transparent 25%,
      #1b85c1 0,
      #1b85c1 37.5%,
      transparent 0,
      transparent 50%) 0 ~"/" 6em 6em;
}

@keyframes ants {
  to { background-position: 100%; }
}
.marching {
  animation: ants 12s linear infinite;
}

.marching-ants {
  border: 1px solid transparent;
  background: linear-gradient(white, white) padding-box,
    repeating-linear-gradient(-45deg, black 0, black 25%, white 0, white 50%
) 0 ~"/" .6em .6em;
  .marching;
}

.footnote {
  border-top: .2em solid transparent;
  border-image: 100% 0 0 linear-gradient(90deg, currentColor 4em, transparent 0);
}
/**
 * More patterns
 * http://lea.verou.me/css3patterns/
 * http://philbit.com/svgpatterns/
 * https://bennettfeely.com/gradients/
 */
              
            
!

JS

              
                
              
            
!
999px

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