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Borda inferior serrilhada

A Pen By Maujor

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HTML

            
              <!--Essa pen exemplifica o que foi mostrado no tutorial hospedado em
 http://maujor.com/tutorial/borda-serrilhada-com-css.php -->
<blockquote>
  <p>
        Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Morbi eleifend, purus quis laoreet faucibus, ante augue malesuada mi, id rhoncus augue lorem eget elit. Ut sollicitudin sodales purus. Phasellus libero felis, blandit nec, commodo ut, imperdiet ut, nibh. Suspendisse potenti. Donec ullamcorper cursus dolor. Duis vitae ipsum. Maecenas dapibus hendrerit diam.
  </p>
</blockquote>
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CSS

            
              body {
  background: black;
}

blockquote {
  background: white;
  min-width: 320px;
  max-width: 100px;
  min-height: 200px;
  margin: 0 auto;
  position: relative;
  padding: 10px 5px;
  text-align: center;
}

blockquote:after {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 29px;
  right: 0;
  bottom: -24px;
  left: 0;
  background: 
    linear-gradient(-45deg, transparent 70%, white 75% ), 
    linear-gradient( 45deg, transparent 70%, white 75% );
  background-repeat: repeat-x;
  background-size: 25px 20px, 25px 20px;
  background-position: center;
}
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JS
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999px
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Console