#bounce {
	padding: 5px;
	border: 1px solid black;
	width: 50px;
	height: 50px;
	text-align: center;
	background-color: #7FFF00;
}
#ex {
	list-style: none;
}
#ex li {
	float: left;
	padding: 5px;
	border: 1px solid black;
	width: 50px;
	height: 50px;
	text-align: center;
}
#a {
	background-color: #7FFF00;
}
#b {
	background-color: Yellow;
}
#c {
	background-color: Orange;
}
#d {
	background-color: Red;
}
#e {
	background-color: #8A2BE2;
}
#f {
	background-color: Blue;
}