.gallery {
	position: relative;
	margin: 0;
	width: 640px;
	height: 480px;
	background: none;
	border: none;
}

.gallery figure {
	position: absolute;
	display: inline-block;
	width: 640px;
	margin: 0;
	top: 0;
	left: 0;
	z-index: 1;
	animation: wechseln 18s infinite;
}

.gallery figure:last-of-type {
	position: relative;
}

@keyframes wechseln {
	0% {
		opacity: 0;
	}
	20% {
		opacity: 1;
	}
	40% {
		opacity: 1;
	}
	60% {
		opacity: 0;
	}
	100% {
		opacity: 0;
	}
}

.gallery figure:nth-of-type(2) {
	animation-delay: 6s;
	opacity: 0;
}

.gallery figure:nth-of-type(3) {
	animation-delay: 12s;
	opacity: 0;
}