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HTML 

              
                <!doctype html>
<!-- credit https://codepen.io/pbutcher/pen/wMxwbr
for the emojis 
-->
<meta charset=utf-8>

<HTML>

<HEAD>
<link rel="stylesheet" href="style.css">
</HEAD>

<BODY>
    <div class="glow"><marquee behavior="scroll" direction="left" scrollamount="15">CREATING ANIMATIONS WITH CSS </marquee></div>
	
<div class="head pink">
  <div class="face happy">
    <div class="eye left"></div>
    <div class="eye right"></div>
    <div class="mouth"></div>
  </div>
</div>
<div class="head yellow">
  <div class="face standard">
    <div class="eye left"></div>
    <div class="eye right"></div>
    <div class="mouth"></div>
  </div>
</div>
<div class="head blue">
  <div class="face sad">
    <div class="eye left"></div>
    <div class="eye right"></div>
    <div class="mouth"></div>
  </div>
</div>
</BODY>

</HTML>
!

CSS 

              
                body {
	width: 100wh;
	height: 90vh;
	color: #fff;
	background: linear-gradient(-45deg, #ffd1f7, #fffbc6, #b4fcff, #ffd1f7,#b4fcff,#fffbc6);
	background-size: 400% 400%;
	-webkit-animation: Gradient 15s ease infinite;
	-moz-animation: Gradient 15s ease infinite;
	animation: Gradient 15s ease infinite;
	max-width:100%;
}

.glow {
	position:absolute;
	
  width: 80%;
  left:10%;
  top: 10%;
  height: 80px;
  margin: 0 auto;
  text-align: center;
  padding: 10px;
  color: pink;
  font: 60px 'Poiret One', cursive;
  box-shadow: inset 0px 0px 14px #ff96ed, 0px 0px 14px #ffd1f7;
  text-shadow: 0px 0px 14px #ffd1f7, 2px 2px 4px #000;
  border: 2px solid pink;
  border-radius: 15px;
  animation: neon 12s ease infinite;
}

@keyframes neon {
		0% {
			  color: #b4fcff;
	  border: 2px solid #b4fcff;
	    text-shadow: 0px 0px 10px #b4fcff, 2px 2px 4px #000;
	    box-shadow: inset 0px 0px 10px #8cfbff, 0px 0px 10px #b4fcff;
		}
		50% {
					  color: #ffd1f7;
			  border: 2px solid #ffd1f7;
			    text-shadow: 0px 0px 14px #ffd1f7, 2px 2px 4px #000;
	    box-shadow: inset 0px 0px 14px #ffbbbb, 0px 0px 14px #ffd1f7;
	}
			75% {
				  color: #fffbc6;
	  border: 2px solid #fffbc6;
	    text-shadow: 0px 0px 10px #fffbc6, 2px 2px 4px #000;
	    box-shadow: inset 0px 0px 10px #fff77a, 0px 0px 10px #fffbc6;
		}
			100% {
				  color: #b4fcff;
	  border: 2px solid #b4fcff;
	    text-shadow: 0px 0px 10px #b4fcff, 2px 2px 4px #000;
	    box-shadow: inset 0px 0px 10px #97fbff, 0px 0px 10px #b4fcff;
		}
}

@-webkit-keyframes Gradient {
	0% {
		background-position: 0% 50%
	}
	50% {
		background-position: 100% 50%
	}
	100% {
		background-position: 0% 50%
	}
}

@-moz-keyframes Gradient {
	0% {
		background-position: 0% 50%
	}
	50% {
		background-position: 100% 50%
	}
	100% {
		background-position: 0% 50%
	}
}

@keyframes Gradient {
	0% {
		background-position: 0% 50%
	}
	50% {
		background-position: 100% 50%
	}
	100% {
		background-position: 0% 50%
	}
}

html, body {
  margin: 0;
  display: flex;
  width: 100%;
  height: 100%;
  background-color: #FFFCEF;
}

.head {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin: auto;
  width: 250px;
  height: 250px;
  background-color: #FFEB97;
  border-radius: 50%;
  position: relative;
}

.face {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin: auto;
  width: 250px;
  height: 250px;
  position: relative;
}
.pink{
	  background-color: #ffd1f7;
}
.yellow{
	  background-color: #fffbc6;
}
.blue{
	  background-color: #b4fcff;
}
.happy {
  animation: happy-look 5s infinite;
}

.standard {
  animation: standard-look 5s infinite;
}

.sad {
  animation: sad-look 5s infinite;
}
.eye
{
  width: 25px;
  height: 25px;
  position: absolute;
  background-color: #000;
  border-radius: 50%;
}

.mouth
{
 width: 100px;
  height: 50px;
  border-style: solid;
  border-radius: 50%;
  border-width: 8px;
  border-color: transparent transparent #000 transparent;
  position: absolute;
}

.happy .eye {
  top: 75px;
  animation: blink 12s infinite;
}


.happy .mouth {
  left: 68px;
  top: 80px;
  animation: happy-mouth 10s infinite;
}
.left{
	 left:45px;
}
.right{
	left:165px;
}
.standard .eye {
  top: 125px;
  animation: blink 6s infinite;
  animation-delay: 1.3s;
}

.standard .mouth {
  width: 75px;
  height: 8px;
  border-radius: 8px;
  left: 75px;
  top: 175px;
}

.sad .eye {
  top: 130px;
  position: absolute;
  animation: blink 20s infinite;
  animation-delay: 3.7s;
}

.sad .mouth {
  border-color: #000 transparent transparent transparent;
  left: 68px;
  top: 186px;
  animation: sad-mouth 10s infinite;
}


@keyframes blink {
  0% {
    transform: scale(1, 1);
  }
  10% {
    transform: scale(1, 1);
  }
  12% {
    transform: scale(1, .1);
  }
  14% {
    transform: scale(1, 1);
  }
  30% {
    transform: scale(1, 1);
  }
  32% {
    transform: scale(1, .1);
  }
  34% {
    transform: scale(1, 1);
  }
  60% {
    transform: scale(1, 1);
  }
  62% {
    transform: scale(1, .1);
  }
  64% {
    transform: scale(1, 1);
  }
}

@keyframes happy-look {
  0% {
    transform: translate(0px, 0px);
  }
  10% {
    transform: translate(10px, 0px);
  }
  20% {
    transform: translate(10px, 0px);
  }
  30% {
    transform: translate(0px, 0px);
  }
  60% {
    transform: translate(0px, 0px);
  }
  70% {
    transform: translate(-10px, -15px);
  }
  80% {
    transform: translate(-10px, -15px);
  }
  90% {
    transform: translate(0px, 0px);
  }
}

@keyframes happy-mouth {
  0% {
    height: 50px;
  }
  10% {
    height: 50px;
  }
  20% {
    height: 50px;
  }
  30% {
    height: 50px;
  }
  60% {
    height: 50px;
  }
  70% {
    height: 40px;
  }
  80% {
    height: 40px;
  }
  90% {
    height: 50px;
  }
}

@keyframes standard-look {
  0% {
    transform: translate(0px, 0px);
  }
  10% {
    transform: translate(-25px, 0px);
  }
  20% {
    transform: translate(-25px, 0px);
  }
  30% {
    transform: translate(0px, 0px);
  }
  60% {
    transform: translate(0px, 0px);
  }
  70% {
    transform: translate(15px, -15px);
  }
  80% {
    transform: translate(15px, -15px);
  }
  90% {
    transform: translate(0px, 0px);
  }
}

@keyframes sad-look {
  0% {
    transform: translate(0px, 0px);
  }
  15% {
    transform: translate(0px, 0px);
  }
  25% {
    transform: translate(0px, -25px);
  }
  35% {
    transform: translate(0px, -25px);
  }
  45% {
    transform: translate(0px, 0px);
  }
  70% {
    transform: translate(0px, 0px);
  }
  80% {
    transform: translate(-15px, -25px);
  }
  90% {
    transform: translate(-15px, -25px);
  }
  100% {
    transform: translate(0px, 0px);
  }
}

@keyframes sad-mouth {
  0% {
    height: 25px;
  }
  15% {
    height: 25px;
  }
  25% {
    height: 50px;
  }
  35% {
    height: 50px;
  }
  45% {
    height: 25px;
  }
  70% {
    height: 25px;
  }
  80% {
    height: 50px;
  }
  90% {
    height: 50px;
  }
  100% {
    height: 25px;
  }
}
!

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