index.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Visualization of sorting algorithms</title>
    <link rel="stylesheet" href="style.css">
</head>

<body>
    <label for="num">Number of bars</label>
    <input type="number" min="50" value="150" id="num" class="num_input">
    <label for="speed">Delay per step(ms)</label>
    <input type="number" min="1" value="50" id="speed" class="num_input">
    <button class="btn" id="randomize">Randomize</button>
    <button class="btn" id="bubble_sort">Bubble Sort</button>
    <button class="btn stop">Stop</button>
    <center>
        <div class="container">

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

</html>