<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div class="box1">box1</div>
  <div class="box2">box2</div>
</body>
</html>
.box1 {
  background-color:blue;
  width:100px;
  height:100px;
  display:grid;
  align-items:center;
  justify-content:center;
  margin-bottom:50px;
}

.box2 {
  margin-top:30px;
  background-color:green;
  width:100px;
  height:100px;
  display:grid;
  align-items:center;
  justify-content:center;
}

External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.