Concentric Circles - MeggiTools

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Concentric Circles</title>
    <style>
        body, html {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            background: #8B4513;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        canvas {
            display: block;
        }
    </style>
</head>
<body>
    <canvas id="canvas"></canvas>
    <script>
        const canvas = document.getElementById('canvas');
        const ctx = canvas.getContext('2d');
        resizeCanvas();
        window.addEventListener('resize', resizeCanvas);
        function resizeCanvas() {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
            draw();
        }
        function draw() {
            const width = canvas.width;
            const height = canvas.height;
            ctx.fillStyle = '#8B4513';
            ctx.fillRect(0, 0, width, height);
            ctx.strokeStyle = '#A0522D';
            ctx.lineWidth = 2;
            for (let y = 0; y < height; y += 100) {
                for (let x = 0; x < width; x += 100) {
                    ctx.beginPath();
                    for (let r = 10; r < 50; r += 10) {
                        ctx.moveTo(x + r, y);
                        ctx.arc(x, y, r, 0, 2 * Math.PI);
                    }
                    ctx.stroke();
                }
            }
        }
        draw();
    </script>
</body>
</html>