css animation两张图片出呼吸闪烁效果

@-webkit-keyframes fadeInOut {
0% {
opacity:1;
}
25% {
opacity:0;
}
50% {
opacity: 0;
}
75% {
opacity:1;
}
}
.trans_fade_image {
position:absolute;
-webkit-animation-name: fadeInOut;
-webkit-animation-timing-function: ease-in-out;
-webkit-animation-iteration-count: infinite;
-webkit-animation-duration: 3s;
}
.banner img{
1920px;
height: 520px;
}