.colum-count-4{
    -webkit-column-count: 4; /* Chrome, Safari, Opera */
    -moz-column-count: 4; /* Firefox */
    column-count: 4;
    -webkit-column-gap: 0px; /* Chrome, Safari, Opera */
    -moz-column-gap: 0px; /* Firefox */
    column-gap: 0px;
}

.colum-count-4 img{
    width: 100%;
    display: inherit;
}

@media all and (max-width: 575.98px){
    .colum-count-4 {
        -webkit-column-count: 2; /* Chrome, Safari, Opera */
        -moz-column-count: 2; /* Firefox */
        column-count: 2;
    }
}