<div>
  <section>section1</section>
  <section>section2</section>
</div>
div {
  background-color: lightblue;
  border: 1px solid black;
  margin: 30px auto;
  width: 300px;
}

section {
  border: 1px solid black;
  padding: 10px;
  margin: 20px;
  background-color: white;
}

External CSS

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External JavaScript

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