<div class="slotholder"><img src="http://www.dfstagingserver.com/brightsmile/wp-content/uploads/2018/11/slider01.jpg"></div>
.slotholder {
webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
-webkit-animation: zoomin 0s ease-in infinite;
animation: zoomin 30s ease-in infinite;

 }
  @-webkit-keyframes zoomin {
  0% {transform: scale(1);}
  50% {transform: scale(1.5);}
  100% {transform: scale(1);}
   }
  @keyframes zoomin {
  0% {transform: scale(1);}
 50% {transform: scale(1.5);}
 100% {transform: scale(1);}
  }