CodePen Embed - 012 Spacing

<div class="outer">
  <div class="inner"></div>
</div>

.outer {
  background: orange;
}
.inner {
  height: 100px;
  width: 100px;
  background: black;
  margin: 0px auto;
}

This Pen is owned by Pengfei Wang on CodePen.

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