Menu

body { 
  background: #f0f0f0; 
}

for (let i = 0; i < 10; i++) {
  console.log(i);            
}

<!DOCTYPE html>
<html lang="pt-br">

<head>
  <meta charset="UTF-8">
  <title>Meu primeiro programa</title>
</head>

<body>
  <h1>Hello World</h1>
</body>

</html>