ul#listOfImages { 
  height: 256px;
  margin: 0;
  padding: 0;
  width: 907px;
  position: relative;
}
  
  ul#listOfImages li {
    display: block;
    height: 256px;
    list-style: none;
    margin: 0;
    padding: 0;
    position: absolute;
    text-align: center;
    width: 907px;
  }