Grid edit

  
    content_copy
  
  
    <style>
      .col {
        background-color: lightgrey;
        border: 1px solid white;
        padding: 1rem;
        text-align: center;
      }
    </style>

    <div class="container">
      <div class="row">
        <div class="col">column</div>
        <div class="col">column</div>
        <div class="col">column</div>
      </div>
      <div class="row">
        <div class="col">column</div>
      </div>
      <div class="row">
        <div class="col">column</div>
        <div class="col">column</div>
      </div>
      <div class="row">
        <div class="col">column</div>
        <div class="col">column</div>
        <div class="col">column</div>
        <div class="col">column</div>
      </div>
    </div>