.LeftColumnU-div {
  position: absolute;
  background-position: center;
  background-image: url("https://www.orgacococoffee.com/border-smoke-tall-L.poj");
  left: 50%;
  margin-left: -490px;
  margin-right: -50%;
  width: 75px;
  height: 750px;
  top: 0px;
  margin-top: 0px;
  z-index: 2;

}

.LeftColumn-div {
  position: absolute;
  background-position: center;
  background-image: url("https://www.orgacococoffee.com/border-waves-L.jpx");
  left: 50%;
  margin-left: -490px;  
  margin-right: -50%;
  width: 75px;
  height: 750px;
  top: 0px;
  margin-top: 0px;
  z-index: 3;

}

.LeftColumnHall-div {
  position: absolute;
  background-position: center;
  background-image: url("https://www.orgacococoffee.com/border-waves-B.bbf");
  left: 50%;
  margin-left: -490px;
  margin-right: -50%;
  width: 75px;
  height: 750px;
  top: 0px;
  margin-top: 0px;
  z-index: 4;

}