<div class="container">
  <div class="box" id="box1">1</div>
  <div class="box" id="box2">2</div>
  <div class="box" id="box3">CSS Positions</div>
  <div class="box" id="box4">4</div>
</div>
.container {
  display: flex;
  border: 2px solid black;
  background-color: skyblue;
  height: 300vh;
}

.box {
  border: 2px solid darkblue;
  width: 150px;
  height: 150px;
  margin: 2px;
  font-size: 30px;
  text-align: center;
  margin-top: 80px;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.