overlay banner script

  <style>
#text{
  position: absolute;
  top: 50%;
  left: 50%;

    font-size: 
  50px;
  color: white;
  transform: 
  translate(-50%,-50%);
  -ms-transform: 
  translate(-50%,-50%);
}
</style>

<div id="overlay">
  
  <div id="text">Overlay Text</div>
</div>