.main_imgBox {
      height: 550px;
    overflow: hidden;
    position: relative; }

  .main_img {
    z-index:10;
    opacity: 0;
    width: 100%;
    height: 550px;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    position: absolute;
    left: 0;
    top: 0;
    -webkit-animation: anime 24s 0s infinite;
    animation: anime 24s 0s infinite; }

animation: anime 24s 0s infinite;

 .main_img:nth-of-type(1) {
      -webkit-animation-delay: 4s;
      animation-delay: 4s; }

    .main_img:nth-of-type(2) {
      -webkit-animation-delay: 4s;
      animation-delay: 4s; }

    .main_img:nth-of-type(3) {
      -webkit-animation-delay: 8s;
      animation-delay: 8s; }

    .main_img:nth-of-type(4) {
      -webkit-animation-delay: 12s;
      animation-delay: 12s; }

    .main_img:nth-of-type(5) {
      -webkit-animation-delay: 16s;
      animation-delay: 16s; }

   .main_img:nth-of-type(6) {
      -webkit-animation-delay: 20s;
      animation-delay: 20s; }

@keyframes anime {
  0% {
        opacity: 0;
    }
    8% {
        opacity: 1;
    }
    17% {
        opacity: 1;
    }
    25% {
        opacity: 0;
        transform: scale(1.0) ;
         z-index:9;
    }
    100% { opacity: 0 }
}