article.potop{
    display: flex;
    flex-direction: column;
}

img{
    margin: 15px;
}

@media(min-width:1000px) {
    article.potop {
        height: 20%;
        flex-direction: row;
    }

    img {
        position: absolute;
        bottom: 4%;
        left: 30%;
        height: 20%;
    }

    img#kostka1 {
        left: 30%;
        height: 20%;
    }
    
    img#kostka2 {
        left: 45%;
        height: 20%;
    }
    
    img#kostka3 {
        left: 60%;
        height: 20%;
    }
}