bootstrap-grid-question

by awenig

HTML

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
    <div class="container">
      <div class="row">
        <div class="col-lg-4 col-md-12" style="border: 2px solid black">
          <div class="row">
            <div class="col-lg-12 col-md-6 border bg-primary" style="height: 300px">
              <h3>BLOC 1</h3>
            </div>
            <div class="col-lg-12 col-md-6 border bg-light">
              <h3>BLOC 2</h3>
            </div>
          </div>
        </div>
        <div class="col-lg-8 col-md-12" style="background-color: tomato;">
          <h3>BLOC 3</h3>
        </div>
      </div>
    </div>