table, th, td{ border:1px solid black; }

table{ margin-left:auto; 
		margin-right:auto;}

h1{text-align:center;
	font-size:50px;}

.bianco{ background-color:#ffffff;
		 color:#000000;
		 border:3px solid black;
		 padding:5px;
		 width:100px;
		 height:100px;
		 text-align:center;
		 font-size:30px;}
		 
.nero{ color:#ffffff;
		 background-color:#000000;
		 border:3px solid black;
		 padding:5px;
		 width:100px;
		 height:100px;
		 text-align:center;
		 font-size:30px;}