I'm writing a basic memory game where you flip 2 cards and if they don't match, they flip back over, but if they do match their background color changes. All of the flipping is done on click; it adds a class of flipped. Right now nothing happens when a match is made; the cards just stay there keeping the flipped class. How can I make it so the bg color changes on a match? Also, I want a button that can reset the game back to all blank cards at any time.How would I do this?