CodePen Embed - Test rectangle with letters

<div class="parent">
<div class="square"></div>
</div>

.parent {
  width: 100%;
}
.square {
  width: 25%;
  background-color: blue;
}

.square::before {
  padding-top: 50%;
  content: "content:に文字を入れるとこうなる。";
  display: block;
}

This Pen is owned by shefuyuta on CodePen.

See more by @shefuyuta on CodePen

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.