body
{
	background:skyblue;
}
#box
{
	width:800px;
	height:800px;
	background:yellow;
	border:30px solid grey;
	margin:auto;
}
.row
{
	height:100px;
	width:100%;
}
.black,.white
{
	width:100px;
	height:100px;
	float:left;
	text-align:center;
	font-size:70px;
	
}
.white
{
	background:white;
}
.black
{
	background:black;
	color:white;
}
h1
{
	font-family:cooper black;
	text-align:center;
	font-size:100px
}