<div class="ocean">
  <div class="wave"></div>
  <div class="wave"></div>
</div>
html,
body {
  height: 100%;
}

body {
  background: radial-gradient(ellipse at center, #fffeea 0%, #fffeea 35%, #b7e8eb 100%);
  overflow: hidden;
}

.ocean {
  height: 5%;
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  background: #015871;
}

.wave {
  background: url(https://cdn.kcak11.com/codepen_assets/wave_animation/wave.svg) repeat-x;
  position: absolute;
  top: -198px;
  width: 6400px;
  height: 198px;
  animation: wave 7s cubic-bezier(0.36, 0.45, 0.63, 0.53) infinite;
  transform: translate3d(0, 0, 0);
}

.wave:nth-of-type(2) {
  top: -175px;
  animation: wave 7s cubic-bezier(0.36, 0.45, 0.63, 0.53) -0.125s infinite, swell 7s ease -1.25s infinite;
  opacity: 1;
}

@keyframes wave {
  0% {
    margin-left: 0;
  }
  100% {
    margin-left: -1600px;
  }
}
@keyframes swell {
  0%,
	100% {
    transform: translate3d(0, -25px, 0);
  }
  50% {
    transform: translate3d(0, 5px, 0);
  }
}
.endWave{
	display:none;
}

External CSS

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External JavaScript

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