.dot-matrix {
    display: grid;
    grid-template-rows: repeat(4, 20px);
    grid-template-columns: repeat(6, 20px);
    gap: 1px;
    border-style: solid;
    border-color: black;
    padding: 2px;
}
.dot {
    background-color: #808080;
    width: 20px;
    height: 20px;
    border-radius: 4px;
}
.dot.on {
    background-color: #cc8500;
}
.dot.off {
    background-color: #000000;
}