#carouselExampleIndicators {
    @media (min-width: 768px){
        height: 500px;
        width: 500px;
        float: left;
        margin-right: 15px;
        margin-bottom: 30px;

    }

    @media (max-width: 768px){
        height: 400px;
        width: 400px;
        margin-top: 15px;
        margin-bottom: 30px;
        margin-left:10px;
    }
}

.d-block{
    @media (min-width: 768px){
        height:500px;
    }
    @media (max-width: 768px){
        height:400px;
    }

.carousel-control-prev .carousel-control-next{
    z-index: +5;
}