index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Etch-a-Sketch</title>
    <style>
        button {
            display: block;
            margin-bottom: 12px;
            margin-left: auto;
            margin-right: auto;
        }

        .pixels {
            /* opacity: 0; */
            border: 0.1px solid #AAAAAA;
            border-collapse: collapse;
        }

        #sketchArea {
            display: flex;
            flex-direction: column;
            margin: auto;
            width: 900px;
            height: 900px;
        }
    </style>
</head>
<body>
    <button id="gridSelector">Change grid size!</button>
    <div id="sketchArea">

    </div>
    <script src="./script.js"></script>
</body>
</html>