*{
    margin: 0;
    padding: 0
}
.div{
    width: 100%;
    height:600px;
    /*background-repeat: no-repeat;*/
    background-image: url("/img/logo.png");
    animation:frams 10s ;
}
@keyframes frams {
    /*0%{*/
    /*background-image: url("/img/18.png");background-size: 100% 100%;background-repeat: no-repeat*/
    /*}*/
    /*33%{*/
    /*background-image: url("/img/19.png");background-size: 100% 100%;background-repeat: no-repeat*/
    /*}*/
    /*66%{*/
        /*background-image: url("/img/beijing2.jpg");background-size: 100% 100%;background-repeat: no-repeat*/
    /*}*/
    /*100%{*/
        /*background-image: url("/img/beijing2.jpg");background-size: 100% 100%;background-repeat: no-repeat*/
    /*}*/
}