trial.html

<!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>
    <style>
        body{
            margin: 0;
            text-align: center;
        }
        .up{
            background-color: blue;
            height: 100vh;
            
        }
        .down{
            background-color: red;
            height: 100vh;
        }
        .cont{
            position: relative;
            top: 100px;
        }
        h1{
            margin-top: 0px;
        }
    </style>
</head>
<body>
    <div class="up">
        <div class="cont">
            <h1>hello</h1>
            <h2>I am coder</h2>
        </div>
    </div>
    <div class="down"></div>
</body>
</html>