.carousel-outer {
  position: relative;
  width: 320px;
  margin: 100px auto 0 auto;
  perspective: 900px;
}

.carousel {
  position: absolute;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d; 
  animation: rotate360 60s infinite forwards linear;
}
.carousel__face { 
  position: absolute;
  width: 300px;
  height: 187px;
  top: 20px;
  left: 10px;
  right: 10px;
  background-size: cover;
  box-shadow:inset 0 0 0 2000px rgba(0,0,0,0.3);
  display: flex;
}

.carousel__face:nth-child(1) {
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.001.jpg");
  transform: rotateY(  0deg) translateZ(430px); }
.carousel__face:nth-child(2) { 
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.002.jpg");
    transform: rotateY( 40deg) translateZ(430px); }
.carousel__face:nth-child(3) {
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.003.jpg");
  transform: rotateY( 80deg) translateZ(430px); }
.carousel__face:nth-child(4) {
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.004.jpg");
  transform: rotateY(120deg) translateZ(430px); }
.carousel__face:nth-child(5) { 
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.005.jpg");
 transform: rotateY(160deg) translateZ(430px); }
.carousel__face:nth-child(6) { 
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.006.jpg");
 transform: rotateY(200deg) translateZ(430px); }
.carousel__face:nth-child(7) { 
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.007.jpg");
 transform: rotateY(240deg) translateZ(430px); }
.carousel__face:nth-child(8) {
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.008.jpg");
  transform: rotateY(280deg) translateZ(430px); }
.carousel__face:nth-child(9) {
  background-image: url("https://www.yachtassistinc.com/wp-content/uploads/2021/07/yacht.assist.009.jpg");
  transform: rotateY(320deg) translateZ(430px); }



@keyframes rotate360 {
  from {
    transform: rotateY(0deg);
  }
  to {
    transform: rotateY(-360deg);
  }
}