Untitled

dabblet.css

.number {
	font: 55px Charocal, Impact, 'Arial Black', sans-serif;
	width: 80px;
	height: 80px;
	line-height: 81px;
	border-radius: 5px;
	text-align: center;
	position: relative;
}

.number span {
	position: absolute;
	left: 0;
	width: 100%;
	height: 50%;
	background: #444;
	color: papayawhip;
	overflow: hidden;
	transform: perspective(500px) rotateX(0deg);

}

.number:hover .number-1 {
	transform: perspective(500px) rotateX(-90deg);
}

.number:hover .number-2 {
	/*transform: perspective(500px) rotateX(-90deg);*/
}

.number:hover .new-number-2 {
	transform: perspective(500px) rotateX(0deg);
}

.number .new-number-2 {
	transform: perspective(500px) rotateX(90deg);
	z-index: 2;
}

.number-1,
.new-number-1 {
	border-radius: 4px 4px 0 0;
	transition: transform .5s ease-in;
	transform-origin: bottom center;
	z-index: 1;
}

.number-2,
.new-number-2 {
	margin-top: 50%;
	line-height: 0px;
	border-radius: 0 0 4px 4px;
	transition: transform .5s ease-out;
	transform-origin: top center;
	transition-delay: .5s;
	z-index: 1;
}

dabblet.html

<div class="number">
	<span class="new-number-1">55</span>
	<span class="new-number-2">55</span>
	<span class="number-1">24</span>
	<span class="number-2">24</span>
</div>

settings.json

{"view":"split-vertical","fontsize":"100","seethrough":"","prefixfree":"1","page":"result"}