.main {
    background-image: url(https://i.im.ge/2024/07/31/VBvLYF.Columbia1.jpeg);
    animation: change 15s infinite ease-in-out;
}
@keyframes change {
    0% {
        background-image: url(https://i.im.ge/2024/07/31/VBvLYF.Columbia1.jpeg);
    }
    20% {
        background-image: url(https://i.im.ge/2024/07/31/VBvQFm.Columbia2.jpeg);
    }
    40% {
        background-image: url(https://i.im.ge/2024/07/31/VBpekf.Columbia3.jpeg);
    }
    60% {
        background-image: url(https://i.im.ge/2024/07/31/VBvTjr.Columbia4.jpeg);
    }
    80% {
        background-image: url(https://i.im.ge/2024/07/31/VBpGt1.Columbia5.jpeg);
    }
    100% {
        background-image: url(https://i.im.ge/2024/07/31/VBvoRW.Columbia6.jpeg);
    }
}