@-webkit-keyframes piscaporra {
0%, 40%, 80% {opacity: 1;}	
	20%, 60%, 100% {opacity: 0;}
                           }
@-moz-keyframes piscaporra {
0%, 40%, 80% {opacity: 1;}	
	20%, 60%, 100% {opacity: 0;}
}

@-o-keyframes piscaporra {
0%, 40%, 80% {opacity: 1;}	
	20%, 60%, 100% {opacity: 0;}
}

@keyframes piscaporra {
0%, 40%, 80% {opacity: 1;}	
	20%, 60%, 100% {opacity: 0;}
}