#table{
    border:1;
    border-collapse: collapse;
    table-layout: fixed;
    height: 300px;
    width: 300px;
}
#table tr{
    height: 100px;
}
#table td{
    width: 100px;
    height: 100px;
    font-size: 60px;
    cursor: pointer;
}

.background{
    background-color: aqua;
}

.button{
    display: none;
}