<div class="scrolling-box">
  <section id="1">This is the first section</section>
  <section id="2">This is the second section</section>
  <section id="3">This is the third section</section>
</div>

body {
  background-color: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.scrolling-box {
  background-color: #eaeaea;
  display: block;
  width: 200px;
  height: 200px;
  padding: 1em;
  overflow-y: scroll;
  text-align: center;
}

section {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}