styles.css

#siteName {
  font-family: "Pirata One", cursive;
  text-align: center;
  font-size: 50px;
}

#container {
  display: flex;
  justify-content: center;
  height: 720px;
}

body {
  background: linear-gradient(
    rgb(235, 230, 144),
    #bbf7ff 
  );
  overflow: hidden;
}

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

.wave {
  background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/85486/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);
  }
}

#btnStart {
  background-color: rgba(0, 0, 0, 0.5);
  border: solid 1px#ffffff;
  border-radius: 20px;
  font-family: "Pirata One", cursive;
  justify-content: center;
  text-align: center;
  font-size: 50px;
  height: 60px;
  width: 200px;
  position: absolute;
  bottom: 20%;
  right: 15%;
}