Bandeira do Brasil | JavaScript e HTML: pratique lógica com desenhos, animações e um jogo

<!DOCTYPE html>
<html lang="pt-br">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Bandeira do Brasil</title>
</head>
<body>
    <canvas width="600" height="400"></canvas>

    <script>
        var tela = document.querySelector("canvas");
        var pincel = tela.getContext("2d");

        pincel.fillStyle="green";
        pincel.fillRect(0,0,600,400);
        pincel.fill();

        pincel.fillStyle="yellow";
        pincel.beginPath();
        pincel.moveTo(300,50);
        pincel.lineTo(50,200);
        pincel.lineTo(550,200);
        pincel.fill();

        pincel.fillStyle="yellow";
        pincel.beginPath();
        pincel.moveTo(300,350);
        pincel.lineTo(550,200);
        pincel.lineTo(50,200);
        pincel.fill();

        pincel.fillStyle="blue";
        pincel.beginPath();
        pincel.arc(300,200,100,0, 2 * 3.14);
        pincel.fill();

    </script>

</body>
</html>