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<html>
    <head>
        <title>JS Mandelbrot</title>
        <script src="https://nerget.com/mandelbrot.js"></script>
        <script>
        var drawn = false;
        var dimension = 2;
        var cx = -dimension / 2 + 0.5;
        var cy = -dimension / 2;
        
        function log(msg) {
            document.getElementById("log").innerHTML += msg + "<br/>";
        }
        
        function draw() {
            var forceSlowPath = document.getElementById('forceSlowPath').checked;
            drawMandelbrot(document.getElementById('canvas').getContext('2d'), 200, 200, 
                           cx + dimension / 2, cy + dimension / 2, dimension, 500, forceSlowPath);
            drawn = true;
        }
        
        </script>
    </head>
    <body>
        <canvas id="canvas" width="200" height="200" style="border: 1px solid black;"></canvas>
        <br />
        <input id="forceSlowPath" type="checkbox">Use slow path.</input> <br />
        <a href="javascript:draw()">Start</a>
        <div id="log"></div>
    </body>
</html>