Added a transition property to lines 31-49 in sylvania.html

transision.css

html.letter {
	background-color: #D3FF99;
	color: #005046;
}

html.transition {
	transition: background-color 2.0s ease;
	background-color: #005046;
	color: #ffffff;
}

html.camp {
	transition: background-color 2.0s ease;
	background-color: #00134C;
	color: #E5EBFF;
}

html.creek {
	transition: background-color 2.0s ease;
	background-color: #3F0066;
	color: #FFF9CC;
}