body {
     padding: 20px;
     background-color: #444;
}

#gridContainer {
     padding-bottom: 10px;
}

table {
    background-color: green;
    border-spacing: 0px;
}

td {
    border: 1px solid rgb(90,90,90);
    width: 8px;
    height: 8px;
}

td.dead {
    background-color: transparent;
}

td.live {
    background-color: white;
}