#bildwechsel {
 width:100%;
 position:relative;
 padding-bottom:26.66%;
 background-color:#eeeeee;
}

#bildwechsel img {
position:absolute;
opacity:0;
}

#bildwechsel img:nth-of-type(1) {
animation:fade 35s ease-in-out infinite;
}

#bildwechsel img:nth-of-type(2) {
animation:fade 35s 7s ease-in-out infinite;
}

#bildwechsel img:nth-of-type(3) {
animation:fade 35s 14s ease-in-out infinite;
}

#bildwechsel img:nth-of-type(4) {
animation:fade 35s 21s ease-in-out infinite;
}

#bildwechsel img:nth-of-type(5) {
animation:fade 35s 28s ease-in-out infinite;
}

@keyframes fade {
11.11%, 20% {
opacity:1;
}

0%, 31.11%, 100% {
opacity:0;
}
}