#shape {
  position: absolute;
  left: 0;
  bottom: -1vw;
}
.waves img:not(#shape) {
  position: absolute;
  left: 0;
}
.waves img:nth-child(1) {
  opacity: 0.8;
  bottom: -0.1vw;
  animation: move-1 5s infinite;
}
@keyframes move-1 {
  50% {
    transform: translateY(35px);
  }
}
.waves img:nth-child(2) {
  opacity: 0.7;
  bottom: 0.5vw;
  animation: move-2 4s infinite;
}
@keyframes move-2 {
  50% {
    transform: translateY(25px);
  }
}
.waves img:nth-child(3) {
  bottom: 0.3vw;
  opacity: 0.6;
  animation: move-3 3.5s infinite;
}
@keyframes move-3 {
  50% {
    transform: translateY(20px);
  }
}
.waves img:nth-child(4) {
  bottom: 0.1vw;
  opacity: 0.5;
  animation: move-4 3s infinite;
}
@keyframes move-4 {
  50% {
    transform: translateY(20px);
  }
}