.circle_of_fourths {
    border: none;
    margin-left: auto;
    margin-right: auto;
    border-spacing: 30px 0px;
}

.circle_of_fourths tr {
    border: none;
}

.circle_of_fourths td {
    border: none;
    padding-top: 0;
    padding-bottom: 0;
}