Cool-waving-button

button.css

@import url("https://fonts.googleapis.com/css?family=Lato:400,100,300,700,100italic,300italic,400italic,700italic,900,900italic");
@import url("https://fonts.googleapis.com/css?family=Raleway:400,700");
body {
  padding: 0;
  margin: 0;
}
body .btn-bg {
  width: 100%;
  height: 100vh;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
body .btn-bg.Ocean {
  background: #239ed3;
}
body .btn-bg.Ocean .btn-group .Debris button {
  color: #fff;
  overflow: hidden;
  position: relative;
  border-radius: 5px;
  border: 5px solid #fff;
  background: transparent;
  transition: all 2s ease;
}
body .btn-bg.Ocean .btn-group .Debris button span {
  position: absolute;
  content: '';
  top: 1.5em;
  left: 50%;
  width: 20em;
  height: 20em;
  opacity: 0.5;
  background: #fff;
  margin-left: -10em;
  border-radius: 42.5%;
  transform-origin: 50% 50%;
  animation: wave 5s infinite linear;
  transition: all 2s ease, top 1.5s ease;
}
body .btn-bg.Ocean .btn-group .Debris button:hover {
  color: #50514f;
  border-color: #50514f;
  transition: all 2s ease;
}
body .btn-bg.Ocean .btn-group .Debris button:hover span {
  opacity: 1;
  top: 0.5em;
  background-color: #50514f;
  transition: all 2s ease, top 1.5s ease;
}
body .btn-bg.Ocean .btn-group .Coral button {
  color: #fff;
  overflow: hidden;
  position: relative;
  border-radius: 5px;
  border: 5px solid #fff;
  background: transparent;
  transition: all 1s ease;
}
body .btn-bg.Ocean .btn-group .Coral button span {
  position: absolute;
  content: '';
  top: 1.75em;
  left: 50%;
  width: 20em;
  height: 20em;
  margin-left: -10em;
  border-radius: 42.5%;
  transform-origin: 50% 50%;
  transition: all 1s ease, top 1.5s ease;
}
body .btn-bg.Ocean .btn-group .Coral button .Coralwave1 {
  background: #ffb733;
  animation: smallwave 3s infinite linear;
}
body .btn-bg.Ocean .btn-group .Coral button .Coralwave2 {
  background: #f97890;
  animation: smallwave 4s infinite linear;
}
body .btn-bg.Ocean .btn-group .Coral button .Coralwave3 {
  background: #4ab3e1;
  animation: smallwave 5s infinite linear;
}
body .btn-bg.Ocean .btn-group .Coral button:hover {
  transition: all 1s ease;
}
body .btn-bg.Ocean .btn-group .Coral button:hover span {
  top: 0.5em;
  transition: all 1s ease, top 1.5s ease;
}
.btn-group {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
}
@media screen and (max-width: 480px) {
  .btn-group {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
  }
}
.btn {
  margin: 0 30px 30px 30px;
  display: block;
}
.btn-info {
  margin-bottom: 10px;
  text-align: center;
  font-family: 'Lato';
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  font-size: 3.5em;
  color: #fff;
}
.btn-mention {
  margin-bottom: 70px;
  text-align: center;
  font-family: 'Lato';
  letter-spacing: 0.1em;
  font-size: 1.1em;
  color: #fff;
}
.btn-mention span {
  font-size: 1.2em;
  font-weight: 600;
}
button {
  cursor: pointer;
  overflow: visible;
  outline: none;
  color: #fff;
  position: relative;
  letter-spacing: 0.1em;
  font-weight: 400;
  padding: 1rem 3rem 1rem 3rem;
  text-transform: uppercase;
  font-family: "Lato";
  font-size: 1.5em;
}
button a {
  text-decoration: none;
}
@-moz-keyframes wave {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(0.975);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}
@-webkit-keyframes wave {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(0.975);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}
@-o-keyframes wave {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(0.975);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}
@keyframes wave {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(0.975);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}
@-moz-keyframes smallwave {
  0% {
    transform: rotate(0deg) scale(1);
    opacity: 0.8;
  }
  50% {
    transform: rotate(180deg) scale(0.95);
    opacity: 0.25;
  }
  100% {
    transform: rotate(360deg) scale(1);
    opacity: 0.8;
  }
}
@-webkit-keyframes smallwave {
  0% {
    transform: rotate(0deg) scale(1);
    opacity: 0.8;
  }
  50% {
    transform: rotate(180deg) scale(0.95);
    opacity: 0.25;
  }
  100% {
    transform: rotate(360deg) scale(1);
    opacity: 0.8;
  }
}
@-o-keyframes smallwave {
  0% {
    transform: rotate(0deg) scale(1);
    opacity: 0.8;
  }
  50% {
    transform: rotate(180deg) scale(0.95);
    opacity: 0.25;
  }
  100% {
    transform: rotate(360deg) scale(1);
    opacity: 0.8;
  }
}
@keyframes smallwave {
  0% {
    transform: rotate(0deg) scale(1);
    opacity: 0.8;
  }
  50% {
    transform: rotate(180deg) scale(0.95);
    opacity: 0.25;
  }
  100% {
    transform: rotate(360deg) scale(1);
    opacity: 0.8;
  }
}

waving-button.html

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>CodePen - animation button#3-hover effect</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">
<link rel="stylesheet" href="./button.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>

</head>
<body>
<!-- partial:index.partial.html -->
<body>
  <div class="btn-bg Ocean">
    <div class="btn-info">Ocean</div>
    <div class="btn-mention">too much <span>Debris</span>, too few <span>Coral</span></div>
    <div class="btn-group">
      <div class="btn Debris">
        <button href="#">debris<span class="one"></span></button>
      </div>
      <div class="btn Coral">
        <button href="#">coral<span class="Coralwave1"></span><span class="Coralwave2"></span><span class="Coralwave3"></span></button>
      </div>
    </div>
  </div>
</body>
<!-- partial -->
  <script  src="./script.js"></script>

</body>
</html>