*{
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
}

table {
    width: 300px;
    height: 300px;
    border-collapse: collapse;
}

td {
    width: 20%;
    height: 20%;
}

.red {
    background-color: red;
}

.white {
    background-color: white;
}