<div class="container">
  <div class="item">アイテム1</div>
  <div class="item">アイテム2</div>
  <div class="item">アイテム3</div>
  <div class="item">アイテム4</div>
  <div class="item">アイテム5</div>
</div>
.container {
  width: 400px;
  background-color: bisque;
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;
}

.item {
  margin-bottom: 12px;
  height: 120px;
  width: 120px;
  background-color: rgb(0, 255, 255);
}

External CSS

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External JavaScript

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