Ordem e Progresso | 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>
        let canvas = document.querySelector('canvas');
        let context = canvas.getContext('2d');

        context.fillStyle = 'green';
        context.fillRect(0,0,600,400);

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

        context.beginPath();
        context.moveTo(300,350);
        context.lineTo(50,200);
        context.lineTo(550,200);
        context.fill();

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

    </script>
</body>
</html>