index.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">
  <link rel="stylesheet" href="main.css">
  <title>Conway's Game of Life</title>
</head>
<body>
  <div class="container">
    <h1>Conway's game of life</h1>
    <canvas id="gameOfLife" height="600" width="600"></canvas>
    <div class="buttons">
      <button id="start" class="btn green">Start</button>
      <button id="stop" class="btn red">Stop</button>
    </div>
  </div>

  <script type="text/javascript" src="parts/game.js"></script>
  <script type="text/javascript" src="parts/cell.js"></script>
  <script type="text/javascript" src="parts/board.js"></script>
  <script type="text/javascript" src="main.js"></script>

</body>
</html>