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HTML 

              
                <div class="container">
  <div class="wave"></div>

  <div class="underwater">

    <div class="submarine move-down fadeInDown">

    </div>
    
    <div class="moving-content move-down text-delay fadeInDownText">
      <h2>Cute Submarine</h2>
      
      <p>Most large submarines consist of a cylindrical body with hemispherical (or conical) ends and a vertical structure, usually located amidships, which houses communications and sensing devices as well as periscopes. In modern submarines, this structure is the "sail" in American usage, and "fin" in European usage. A "conning tower" was a feature of earlier designs: a separate pressure hull above the main body of the boat that allowed the use of shorter periscopes. There is a propeller (or pump jet) at the rear, and various hydrodynamic control fins. Smaller, deep-diving and specialty submarines may deviate significantly from this traditional layout. Submarines use diving planes and also change the amount of water and air in ballast tanks to change buoyancy for submerging and surfacing.</p>
    </div>

  
</div>
!

CSS 

              
                /* tangerine font */
@import url('https://fonts.googleapis.com/css?family=Raleway:500,700');

@keyframes fadeInDown {
  0% {
    opacity: .8;
    transform: none;
  }

  25% {
    opacity: 1;
    transform: translate(0, 15px);
  }
  
  50% {
    opacity: 1;
    transform: translate(0, 30px);
  }
  
  75% {
    opacity: 1;
    transform: translate(0, 15px);
  }
  
  100% {
    opacity: 1;
    transform: none;
  }
}

@keyframes fadeInDownText {
  0% {
    opacity: .8;
    transform: none;
  }

  100% {
    opacity: 1;
    transform: translate(0, 35px);
  }
}

.fadeInDown {
    -webkit-animation-name: fadeInDown;
    animation-name: fadeInDown;
}

.fadeInDownText {
    -webkit-animation-name: fadeInDownText;
    animation-name: fadeInDownText;
}

.container {
  max-width: 60%;
  margin: 0 auto;
}

.underwater {
  position: relative;
  min-height: 600px;
  background-color: #4fc3da;
}

.move-down{
    -webkit-animation-duration: 4s;
    animation-duration: 4s;
    -webkit-animation-timing-function: ease-in-out;
    animation-timing-function: ease-in-out;
    -webkit-animation-iteration-count: 15;
    animation-iteration-count: 15;
}

.text-delay {
    -webkit-animation-delay: 2s; /* Safari 4.0 - 8.0 */
    animation-delay: 2s;
    -webkit-animation-iteration-count: 15;
    animation-iteration-count: 15;
}

.submarine {
  height: 100px;
  width: 100px;
  margin: 0 auto;
  background: url("http://www.abbeyjfitzgerald.com/wp-content/uploads/2017/03/little-submarine.svg") no-repeat;
}



.moving-content {
  font-family: 'Raleway', sans-serif;
  width: 80%;
  margin: 30px auto;
  text-align: center;
  color: white;
}

.moving-content h2 {
  color: #4d275f;
}

.wave{
  background-color: #afdee8;
  height: 50px;
  position: relative;
}
.wave::before{
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  background-repeat: repeat;
  height: 10px;
  background-size: 20px 20px;
  background-image:
    radial-gradient(circle at 10px -5px, transparent 12px, #4fc3da 13px);
}
.wave::after{
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  background-repeat: repeat;
  height: 15px;
  background-size: 80px 20px;
  background-image:
    radial-gradient(circle at 30px 15px, #4fc3da 12px, transparent 13px);
}
!

JS
!
999px

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