.fader {
    position: absolute;
    max-width: 800px;
}

.fader:nth-child(1) {
    -webkit-animation: fade 20s 0s infinite;
    z-index:50;
}

.fader:nth-child(2) {
    -webkit-animation: fade 20s 4s infinite;
    z-index:40;
}

.fader:nth-child(3) {
    -webkit-animation: fade 20s 8s infinite;
    z-index:30;
}

.fader:nth-child(4) {
    -webkit-animation: fade 20s 12s infinite; 
    z-index:20;
}

fader:nth-child(5) {
    -webkit-animation: fade 20s 16s infinite; 
    z-index:10;
}

@-webkit-keyframes fade {
    0%{
      opacity: 1;
   }
   15% {
      opacity:1;
   }
   25%{
      opacity: 0;
   }
   90% {
      opacity:0;
   }
   100% {
      opacity:1;
   }
}