<html>
<head>
<style>
div {
background-color: lightblue;
}
div.ex1 {
border: solid black 1px;
margin-block: 35px;
}
</style>
</head>
<body>
<h1>The margin-block Property</h1>
<div>A div element with no specified margins.</div>
<div>A div element with no specified margins.</div>
<div class="ex1">This div element has a margin of 35 pixels on both sides in block direction.</div>
<div>A div element with no specified margins.</div>
<div>A div element with no specified margins.</div>
</body>
</html>