<!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>Progress</title>
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <div class="progress">
    <div id="progress" class="value" style="width: 0%">
      <span></span>
    </div>
  </div>
  <div class="button-group">
    <button id="start">start</button>
    <button id="pause">pause</button>
    <but