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HTML

              
                <div class="dog">
	<div class="heart heart--1"></div>
	<div class="heart heart--2"></div>
	<div class="heart heart--3"></div>
	<div class="heart heart--4"></div>
	<div class="head">
			<div class="year year--left"></div>
			<div class="year year--right"></div>
			<div class="nose"></div>	
		<div class="face">
			<div class="eye eye--left"></div>
			<div class="eye eye--right"></div>
			<div class="mouth"></div>
		</div>
	</div>
	<div class="body">
		<div class="cheast"></div>
		<div class="back"></div>
		<div class="legs">
			<div class="legs__front legs__front--left"></div>
			<div class="legs__front legs__front--right"></div>
			<div class="legs__back legs__back--left"></div>
			<div class="legs__back legs__back--right"></div>
		</div>
		<div class="tail"></div>
	</div>
</div>
              
            
!

CSS

              
                //color variables

$bg-color: #3f3456;
$main-color: #f79e38;
$prime-color: #e99036;
$white-color: #fff;
$black-color: #000;
$red-color: #e64356;

//z-index

$z-index-dog: 0;
$z-index-body: 3;
$z-index-head: 4;
$z-index-tail: 2;
$z-index-legs: 2;
$z-index-cheast: 4;
$z-index-hair: 2;
$z-index-face: 6;
$z-index-mouth: 6;
$z-index-eyes: 6;
$z-index-years: 1;
$z-index-nose: 7;

//animation variables

$duration: 2s;
$total-steps: 20;
$interval: 200ms;
$easing: ease-out;

html, body {
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: $bg-color; 
	background-size: fill;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}
.dog {
	position: absolute;
	top: 52%;
	width: 50vmin;
	height: 40vmin;
	z-index: $z-index-dog;
}
.heart{
	position: absolute;
	width: 6%;
	height: 7%;
	background-color: $red-color;
	border-bottom-right-radius: 23%;
	opacity: 0;
	animation-fill-mode: both;
	@keyframes heart-beat {
		0% { transform: scale(0.75) rotate(35deg); opacity: 1; }
		5%, 15%, 25% { transform: scale(1) rotate(35deg); }
		10%, 20% { transform: scale(0.75) rotate(35deg); }
		70% { opacity: 1;}
		100% {transform: rotate(35deg)  translateY(-10px) translateX(-10px); opacity: 0;}
	}
	&--1 {
		top: -25%;
    left: 15%;
	  animation: heart-beat $duration $easing infinite 1.5s;
	}
	&--2 {
		top: -36%;
    left: 7%;
	  animation: heart-beat $duration $easing infinite 1s;
	}
	&--3 {
		top: -48%;
    left: 14%;
	  animation: heart-beat $duration $easing infinite 0.5s;
	}
	&--4 {
		top: -53%;
    left: -3%;
	  animation: heart-beat $duration $easing infinite;
	}
}
.heart:before,
.heart:after{
  position: absolute;
  width: 100%;
  height: 100%;
  content: '';
  border-radius: 50%;
	background-color: $red-color;
}
.heart:after{
	bottom: 0px;
  left: -53%;
}
.heart:before{
	top: -53%;
  right: 0px;
	transform: rotate(45deg);
}
.body {
	position: absolute;
	width: 100%;
	height: 50%;
	background-color: $main-color; 
	border-top-right-radius: 17% 40%;
	border-top-left-radius: 25%;
	border-bottom-right-radius: 5% 13%;
	border-bottom-left-radius: 30% 40%;
	z-index: $z-index-body; 
}
.cheast {
	position: absolute;
	width: 45%;
	height: 100%;
	background-color: $white-color;
	border-top-right-radius: 17% 40%;
	border-top-left-radius: 25%;
	border-bottom-right-radius: 40% 40%;
	border-bottom-left-radius: 40% 40%;
	z-index: $z-index-cheast; 
	&:after,
	&:before {
		position: absolute;
		content: '';
		width: 7%;
		height: 55%;
		border-radius: 39%;
		background-color: $white-color;
	}
	&:after {
		top: 36%;
		left: 3%;
		transform: rotate(-1deg);
	}
	&:before {
		top: 19%;
		left: -4%;
	}
}
.head {
	position: absolute;
	width: 100%;
	height: 100%;
	z-index: $z-index-head;
	animation: dog-head 1s $easing infinite;
	animation-fill-mode: both;
	animation-direction: alternate; 
	@keyframes dog-head {
		 to {
			transform: translateX(-3px) rotate(3deg);
		}
	}
}
.tail {
	position: absolute;
	top: -14%;
	left: 92%;
	width: 10%;
	height: 45%;
	background-color: $main-color;
	border-top-right-radius: 30% 30%;
	border-top-left-radius: 40% 30%;
	border-bottom-right-radius: 30% 40%;
	border-bottom-left-radius: 40% 40%;
	z-index: $z-index-tail;
	transform: rotate(20deg);
	animation: dog-tail 170ms $easing infinite;
  @keyframes dog-tail {
    from, to {
      transform: rotate(10deg);
    }
    50%, 60% {
      transform: rotate(70deg) translateX(10px) translateY(2px);
    }
	}
	&:before {
		position: absolute;
		content: '';
		top: -8%;
		left: -7%;
		width: 100%;
		height: 50%;
	  background-color: $main-color;
		border-radius: 50%;
	  animation: dog-tail-before 160ms $easing infinite;
		@keyframes dog-tail-before {
			from, to {
				transform: translateX(0);
			}
			50% {
				transform:  translateX(3px);
			}
		}
	}
}
.legs {
	position: absolute;
	top: 97%;
	left: 0;
	width: 100%;
	height: 30%;
	z-index: $z-index-legs;
	animation: dog-legs 1s $easing infinite 1.5s;
	animation-fill-mode: both;
	animation-direction: alternate; 
	@keyframes dog-legs {
		from {
			transform: translateY(-1px);
		}
		to {
			transform: translateY(0px);
		}
	}
	&__front, 
	&__back {
		width: 10%;
		height: 100%;
		background-color: $main-color;
		position: absolute;
		border-bottom-right-radius: 100%;
		border-bottom-left-radius: 100%;
		&:after {
			content: '';
			position: absolute;
			top: 50%;
			width: 100%;
			height: 49%;
			background-color: $white-color;
			border-bottom-right-radius: 100%;
			border-bottom-left-radius: 100%;
		}
	}
	&__front {
		&--left {
			left: 38%;
			transform: rotate(1deg);
		}
		&--right {
			left: 20%;
			transform: rotate(-4deg);
		}
	}
	&__back {
		&--left {
			left: 69%;
			transform: rotate(-7deg);
		}
		&--right {
			left: 85%;
			transform: rotate(2deg);
		}
	}	
}
.face {
	height: 40%;
	width: 42%;
	position: absolute;
	top: -13%;
	left: -3%;
	background-color: $white-color;
	border-top-right-radius: 45% 50%;
	border-top-left-radius: 35% 50%;
	border-bottom-left-radius: 35% 21%;
	z-index: $z-index-face;
	&:after,
	&:before {
		content: '';
    position: absolute;
    background-color: $main-color;
	}
	&:after {
    width: 27%;
    left: 7%;
    height: 23%;
    border-top-right-radius: 100% 100%;
    border-bottom-left-radius: 49% 100%;
    transform: rotate(-64deg);
    top: -1%;
    border-top-left-radius: 0% -20%;
    border-bottom-right-radius: 52% 0%;
    box-shadow: rgba(0, 0, 0, 0.1) 2px -6px 11px 1px
  }
	&:before {
    width: 55%;
    left: 42%;
    top: 0%;
    height: 35%;
    border-radius: 23% 7% 16% 12%;
    transform: rotate(0deg) scaleX(-1);
  }
}
.eye {
	width: 6%;
	height: 6%;
	position: absolute;
	border-radius: 100%;
	top: 24%;
	background-color: $black-color;
	z-index: $z-index-eyes; 
	animation: dog-eye $interval * 9 infinite;
  @keyframes dog-eye {
    from, to {
      animation-timing-function: step-end;
      opacity: 1;
    }
    50%, 55% {
      animation-timing-function: step-start;
      opacity: 0;
    }
	}
	&--left {
	  left: 27%;
	}
	&--right {
	  left: 46%;
	}
}
.mouth {
	background-color: transparent;
	border-color: $black-color;
	width: 44%;
	border-style: solid;
	border-width: 0.7vmin;
	height: 48%;
	z-index: $z-index-mouth; 
	position: absolute;
	bottom: 35%;
	left: 14%;
	border-top-color: transparent;
	border-bottom-left-radius: 72% 100%;
	border-bottom-right-radius: 77% 100%;
	border-right-color: transparent;
	border-top-right-radius: 50%;
	border-left-color: transparent;
	transform: rotate(-41deg);
}
.year {
	position: absolute;
	&--left {
    top: -40%;
    left: 3%;
    height: 47%;
    width: 19%;
    z-index: $z-index-years;
    background-color: $prime-color;
    border-top-left-radius: 68% 100%;
    border-top-right-radius: 100% 100%;
    transform-origin: bottom center;
		animation: left-year 1000ms ease-out infinite;
		animation-fill-mode: both;
		animation-direction: alternate; 
		@keyframes left-year {
			from {
				transform: rotate(-26deg);
			}
			25% {
				transform: rotate(-35deg);
			}
			50% {
				transform: rotate(-26deg);
			}
			to {
				transform: rotate(-40deg);
			}
		}
	}
	&--right {
    top: -39%;
    left: 19%;
    height: 38%;
    width: 18%;
    z-index: $z-index-years;
    background-color: $main-color;
    border-top-left-radius: 56% 100%;
    border-top-right-radius: 100% 100%;
    transform-origin: bottom center;
    border-bottom-right-radius: 14% 38%;
		animation: right-year 1000ms ease-out infinite;
		animation-fill-mode: both;
		animation-direction: alternate; 
		@keyframes right-year {
				from {
				transform: rotate(-331deg);
			}
			25% {
				transform: rotate(-320deg);
			}
			50% {
				transform: rotate(-331deg);
			}
			to {
				transform: rotate(-320deg);
			}
		}
	}
}
.nose {
	position: absolute;
	width: 24%;
	height: 24%;
	background-color: $white-color; 
	z-index: $z-index-nose; 
	left: -12%;
	top: -3%;
	border-bottom-left-radius: 50% 88%;
	border-top-left-radius: 11% 43%;
	transform: rotate(12deg);
	&:after {
		content: '';
		position: absolute;
		width: 50%;
		height: 55%;
		background-color: $black-color;
		border-radius: 100%;
		left: -7%;
		top: -18%;
	}	
}
              
            
!

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