index8.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        html,
        body {
            margin: 0;
            padding: 0;
        }

        button {
            position: absolute;
            top: 0;
            right: 0;
            font-size: 100px;
        }
    </style>
</head>

<body>
    <canvas id="canvas2" width="1000" height="800"></canvas>
    <script>
        var canvasDOM = document.getElementById("canvas2")
        var ctx = canvasDOM.getContext('2d')

        var posX = 0
        var w = 1000
        var h = 800
        var score = 0;

        function degsToRad(degrees) {
            return degrees * Math.PI / 180
        }

        // draw a simple rectangle, but scale it.
        ctx.save();
        ctx.scale(100, 3);
        ctx.fillRect(1, 10, 10, 10);
        ctx.restore();

        // ctx.scale(0.5, 2);
        ctx.fillRect(20, 40, 10, 10);
    </script>
</body>

</html>