<div class="heart">
  <div class="left"></div>
  <div class="right"></div>
</div>

.heart {
	width: 200px;
	height: 200px;
	top: 50%;
	left: 50%;
	z-index: 1;
	display: block;
	position: absolute;
	transform: translate(-50%,-50%);
	animation: heart 1s ease infinite
}

@keyframes heart {
	96% {
		transform: translate(-50%,-50%) scale(.8,.8)
	}

	100% {
		transform: translate(-50%,-50%) scale(1,1)
	}
}

.heart div {
	background: red;
	width: 71px;
	height: 126px;
	top: 40px;
	display: block;
	position: absolute;
	border-radius: 50%
}

.left {
	left: 45px;
	transform: rotate(330deg);
}

.right {
	right: 45px;
	transform: rotate(30deg);
}