shadow: 2px 2px 2px 2px black;
        box-sizing: border-box;
        width: 80%;
        height: 70vh;
        position: absolute;
        z-index: 3;
        transition: 2s all;
        background: url('https://images.unsplash.com/photo-1504512485720-7d83a16ee930?ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=1204&q=80')no-repeat center center/cover;
    }

    #img3.active {
        width: 0;
    }

    #img4 {
        border-left-width: 8px;
        border-right