body {
	background-color:#0088ff;
}

.uno, .dos, .tres {
	position:relative;
	margin-top:-50px;
	height:50px;
	width:50px;  
	background-color:#fff;
	border-top-left-radius:20px;
	border-top-right-radius:20px;
	transition:transform 200ms ease 0s;
}

.dos, .tres {
	margin-top:-30px;
	height:30px;
	width:50px; 
	right:20px;  
}

.tres {
	right:-20px; 
}

.sol {
	text-align:center;
	vertical-align:text-top; 
	width:10px;
	height:10px;
	padding:160px; 
	border-radius:50%;
	margin-right:auto;
	margin-left:auto;
	margin-top:50px;
	background-color: yellow;
}