Visa

Here's a snippet of a credit card field where the little card icon changes based on which bit you're filling in. In this case the icon is pointing out where the CVV # is located on a Visa, and then it'd flip back around to the show the expiration date, and so on. You'd only see one icon at a time - just wanted to show the multiple states of the Visa card (which starts off as a generic card until you start typing in your card #). Also, this is for iOS.