Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link rel="stylesheet" href="https://bootswatch.com/4/flatly/bootstrap.min.css">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">


   <script>
     document.addEventListener('DOMContentLoaded', () => {

    });
   </script>
</head>
<body>
    <!-- задача 1 -->
<div class="container my-4">
    <table style="display:inline-block;vertical-align:top;">
      <tr>
        <td> <input type="button" class="cube form-control btn btn-info" style="width:50px;height:50px" value="1"> </td>
        <td> <input type="button" class="cube form-control btn btn-warning" style="width:50px;height:50px" value="2"> </td>
        <td> <input type="button" class="cube form-control btn btn-info" style="width:50px;height:50px" value="3"> </td>
      </tr>
      <tr>
        <td> <input type="button" class="cube form-control btn btn-danger" style="width:50px;height:50px" value="4"> </td>
        <td> <input type="button" class="cube form-control btn btn-success" style="width:50px;height:50px" value="5"> </td>
        <td> <input type="button" class="cube form-control btn btn-warning" style="width:50px;height:50px" value="6"> </td>
      </tr>
      <tr>
        <td> <input type="button" class="cube form-control btn btn-default" style="width:50px;height:50px" value="7"> </td>
        <td> <input type="button" class="cube form-control btn btn-info" style="width:50px;height:50px" value="8"> </td>
        <td> <input type="button" class="cube form-control btn btn-primary" style="width:50px;height:50px;" value="9"> </td>
      </tr>
    </table>
    <span style="display:inline-block;vertical-align:top;">
      <input type="button" class="form-control" id="" style="width:150px;height:150px;display:inline-block;font-size:50px;" value="0">
    </span>
  </div>

  <!-- задача 2 -->
  <div class="container my-4">
    <input type="button" class="btn btn-danger" id="" value="+"/>
    <input type="button" class="btn btn-danger" id="" value="-">
    <a href="#" class="btn btn-info m-3" id="" data-size="1" style="padding:5px;"> Result </a>
  </div>

    <!-- Задача 3 -->
  <div class="container my-4">
    <div class="progress progress-striped " style="height:20px;">
        <div class="progress-bar progress-bar-striped bg-success " style="width: 100%;"></div>
    </div>
    <div class="progress progress-striped " style="height:20px;">
        <div class="progress-bar progress-bar-striped bg-info " style="width: 60%;"></div>
    </div>
    <div class="progress progress-striped " style="height:20px;">
        <div class="progress-bar progress-bar-striped bg-danger " style="width: 30%;"></div>
    </div>
    <div class="form-group">
        <input type="text" placeholder="въведете число между 1 и 3" class="form-control" id=""/>
        <input type="button" class="form-control btn btn-info" value="Change" id=""/>
      </div>
  </div>
</body>
</html>