.muestra {
	height: 300px;
	width: 400px;
	border: 5px solid #C00;
	margin: 20px;
	padding: 20px;
	background-image: url("f01.png"), url("f02.png"), url("f03.png");
	background-position: bottom, left bottom, left top;
	background-repeat: repeat-x, no-repeat, repeat-x;
	background-color: lightblue;

	
}
.anterior, .posterior {
	height: 100px;
	width: 200px;
	border: 2px solid #30F;
	padding: 5px;
	background-image: url("f01.png"), url("f02.png"), url("f03.png");
	background-position: bottom, bottom, left top;
	background-repeat: repeat-x, no-repeat, repeat-x;
	background-color: lightblue;
	
	
	}