CodePen Embed - VgoNRE

<div class="tab-content"></div>

.tab-content{
margin: 10px auto;
  box-shadow: 
   0 0px 0px 0px rgba(221, 221, 221, 1),
   4px 0 0 0px rgba(221, 221, 221, 1),
   0 4px 0 0px rgba(221, 221, 221, 1),
   -4px 0 0 0px rgba(221, 221, 221, 1);
  width:600px;
  height: 600px;
}

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