@-webkit-keyframes pisca {
	25%, 75% {opacity: 0;}0%, 50%, 100% {opacity: 1;}	
	25%, 75% {opacity: 0;}
                           }
@-moz-keyframes pisca {
	25%, 75% {opacity: 0;}0%, 50%, 100% {opacity: 1;}	
	25%, 75% {opacity: 0;}
}

@-o-keyframes pisca {
	25%, 75% {opacity: 0;}0%, 50%, 100% {opacity: 1;}	
	25%, 75% {opacity: 0;}
}

@keyframes pisca {
	25%, 75% {opacity: 0;}0%, 50%, 100% {opacity: 1;}	
	25%, 75% {opacity: 0;}
}