Query Insert blank Cells

I have a query loop returning data in grid 4. A Total of 24 Cards

I am trying to add a blank card in each row for example:

Card Card Card Blank Card
Blank Card Card Card Card
Card Blank Card Card Card

Either I can specify where they go or I can add a random blank cell every x cards.

I can add a blank card via Before and After but that only get me two.

.grid::before {
    content: "";
    background-color: rgb(214,232,182);
    grid-column: 3;
    grid-row: 1;
}

.grid::after {
    content: "";
    background-color: rgb(214,232,182);
    grid-column: 1;
    grid-row: 3;
}