!html!
html[lang="en"] {
  head {
    meta[charset="UTF-8"].
    title "My First Web Page"
  }
  body[style="background-color: #dddddd"] {
    <# This is a comment #>
    h1 "Welcome to My Web Page"
    p "This is a simple BTML example with a button below."
    button[onclick="alert('Hello, world!')"] "Click Me"
  }
}