.watermarked {
  position: relative;

/*
static
relative
fixed
absolute
sticky
*/ 

}

.watermarked:after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0px;
  left: 0px;
  background-image: url("images/vllogo.png");
  background-size: 100px 100px;
  background-position: 30px 30px;
  background-repeat: no-repeat;
  opacity: 0.2;
}