<style>

.fond {

margin:auto;

top:0;

}

.texte {

color:black;

margin:auto;

position:absolute;

z-index:2;

top:0;

width:100%;

}

</style>

<div class="container-fluid" id="BlocksBrowser"></div>

<div class="container-fluid bg-grey">

  <div class="row">

    <div class="col-sm-12 text-center">

      Drawing the splines

    </div>

  </div>

</div>