html
                 <div class="container">
  <div class="row">
    <div class="col bg-danger">1</div>
    <div class="col bg-info">2</div>
    <div class="w-100"></div>
    <div class="col bg-success">3</div>
    <div class="col bg-primary">4</div>
  </div>
</div>
 
            

        
css
                 
 
            

            
js