De Lá pra Cá.html

<!DOCTYPE html>
<html lang="pt-BR">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>De lá Pra cá</title>
    <script>
        function contagemDecrescente() {
            document.write("10, 9, 8, 7, 6, 5, 4, 3, 2, 1");
        }
    </script>
</head>
<body onload="contagemDecrescente()">
</body>
</html>