#example-element {
    border: 1px solid #c5c5c5;
    width: 220px;
    display: grid;
    grid-template-columns: 60px 60px;
    grid-auto-rows: 40px;
    grid-gap: 10px;
}

#example-element > div {
    background-color: rgba(0, 0, 255, 0.2);
    border: 3px solid blue;
}