demo-container { display: block; border: 2px solid rgb(189, 189, 189); padding: 25px 10px 10px; border-radius: 4px; width: fit-content; height: fit-content; }
demo-frame {
    height: 100%;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}
scrol-ler {
    text-align: left;
    width: 250px;
    height: 250px;
    overflow-x: scroll;
    display: flex;
    box-sizing: border-box;
    border: 1px solid black;
    scroll-snap-type: x mandatory;
}

scrol-ler > inner-flex {
    flex: 0 0 66%;
    width: 250px;
    background-color: rebeccapurple;
    color: white;
    font-size: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}
scrol-ler > inner-flex:nth-child(even)
 {
    background-color: white;
    color: rebeccapurple;
}




.element { scroll-snap-align: center; }