.preloader__section{
    background-image: url("../img/bgr-dots-32f15916.png");
}
.loaded.preloader .preloader__section--left {
    opacity: 0;
    transform: translateX(-100%);
    transition: all 0.5s 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}
.loaded.preloader .preloader__section--right {
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.5s 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}