index5.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>
        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
        }

        //here we translate initially the grid to the screen center
        ctx.translate(w/2, h/2)

        //this variable holds the number of lines you want to draw
        var starComplexity = 45/40
        for (var i = 0; i < 360 / starComplexity; i++) {
            // ctx.translate(0, i * 10)
            //here we rotate acumulatively the grid
            ctx.rotate(degsToRad(starComplexity * i))

            //the next lines draw a straight line
            ctx.beginPath()
            ctx.lineWidth = 10;
            ctx.strokeStyle = `rgba(${Math.random() * 255}, 0, 0, 0.3)`
            ctx.moveTo(0, 0)
            ctx.lineTo(400, 0)
            ctx.stroke();
        }

        // ctx.beginPath()
        // ctx.lineWidth = 5;
        // ctx.strokeStyle = "#ff0000"
        // ctx.moveTo(100, 100)
        // ctx.lineTo(200, 100)
        // ctx.stroke();
    </script>
</body>

</html>