body {
    font-family: monospace;
    background-color: #333;
    color: #fff;
    text-align: center;
}

td {
    border: .5px solid #ccc;
}

#grid{
    width: 60vw;
    height: 60vw;
    margin: auto;
}
  
.alive {
    background-color: red;
}