<!DOCTYPE html>
<head>
<title>Block size property in CSS</title>
<style type="text/css">
.exampleText {
writing-mode: vertical-rl;
background-color: red;
block-size: 250px;
}
</style>
</head>
<body>
<p class="exampleText">Welcome To Study Tonight!</p>
</body>
</html>