CodePen Embed - OqjgpG

<div class="container">
</div>

.container{
  background:red;
  width:200px;
  height:200px;
  margin: 100px;
  /* box-shadow: 5px 5px 10px 0 rgba(0,0,0,.2); */
  /* box-shadow: inset 5px 5px 10px 0 rgba(0,0,0,.2); */
  box-shadow: 0 0 0 5px green;
}

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