life.css

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

#gridContainer {
  padding-bottom: 10px;
}

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

td {
  border: 1px solid rgb(90, 90, 90);
  width: 5px;
  height: 5px;
}

td.dead {
  background-color: transparent;
}

td.live {
  background-color: white;
}