.sec-img-bg {
  -webkit-animation: linear infinite;
  -webkit-animation-name: run-lft-right;
  -webkit-animation-duration: 5s;
  right: 45%;
    bottom: 7%;
    z-index: 9 !important;
}
@-webkit-keyframes run-lft-right {
  0% {
    right: 45%;
  }
  50% {
    right: 50%;
  }
  
}
.frst-img-bg {
  -webkit-animation: linear infinite;
  -webkit-animation-name: run-top-btm;
  -webkit-animation-duration: 5s;
  left: 47%;
  bottom: 47%;
  z-index: 9 !important;
}
@-webkit-keyframes run-top-btm {
  0% {
    bottom: 47%;
  }
  50% {
    bottom: 50%;
  }
  
}