.borders, .borders td {
   border: solid black 1px;
 }
 .empty, .painted, .robot {
	border:solid black 1px;
	width:16px;
	height:16px;
	font-size:0.1em;
 }
 .empty {
	background-color: white;
 }
 .painted {
	background-color: #606060;
 }
 .robot {
	background-color: red;
 }