.caja1 {
	width:150px;
	height:70px;
	background-color:blue;
	border:1px;
	border-style:solid;
	margin-bottom:20px;
}

.caja2 {
	width:250px;
	height:100px;
	background-color:blue;
	border:1px;
	border-style:solid;
	margin-bottom:20px;
}