1. HTML 
    <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=gt;
<meta name="viewport" content="width=device-winitial-scale=10">
<title>Document</title>
</head>
<body>
                        
</body>
</html>
  2. CSS 
    body{
background-color: black;
}
  3. JS 
    let name = "Ali";
console.log('My name is' +  name);