Barra

<!DOCTYPE html>
<html>
<style>
#myProgress {
  width: 100%;
  background-color: #ddd;
}

#myBar {
  width: 80%;
  height: 30px;
  background-color: #4CAF50;
}

#label {
  text-align: center;
  line-height: 30px;
  color: white;
}
</style>
<body>

<h1>JavaScript Progress Bar</h1>

<div id="myProgress">
  <div id="myBar">
    <div id="label">80%</div>
  </div>
</div>

</body>
</html>