HTML <hr>tag at PNLdev

Run
<!DOCTYPE html>
<html>
<head>
    body{
        background-color: #9e9e9e;
    }
    h1{
        color: #fff;
        text-align: center;
    }
    h2{
        font-weight: 1000;
        text-align: center;
    }
</head>
<body>
    <h1>Hello, welcome to the PNLdev website</h1>
    <hr>
    <h2>This is an sample for a hr tag</h2>
</body>
</html>