How does a player score a 12-ringer in American 9-pin bowling?

In American nine-pin bowling, a ringer is an equivalent term for knocking down all pins on the first ball of the frame (known as a "full house").

They use nine [pins] and set them up in a diamond. The one in the center is painted red. If you knock them all over, you score a 9. If you knock over the 8 surrounding the red pin and leave it standing, you score a 12 ringer.