html,
body {
    width: 320px;
    height: 264px;
    margin: 0;
    overflow: hidden;
}

.wvledslider {
    position: relative;
    box-sizing: content-box;
    width: 310px;
    height: 254px;
    overflow: hidden;
    border: 5px solid #59b42d;
}

.wvledslider__image {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 310px;
    height: 254px;
    opacity: 0;
    transition: opacity .5s ease-in;
}

.wvledslider__image:first-child {
    opacity: 1;
}