re: NFL Overtime Scenario: Opening with an onside kick, Can recov. team win w/ FG?

Something kind of cool that may not be known. So overtime starts, say it takes team a 11 minutes to go down the field and score a field goal. Team b then gets the ball and is in the middle of their drive, but the four minutes runs out in the overtime period. The game is in fact not over, because team b is still on their opening overtime possession. So a second overtime will begin for the conclusion of team b's possession.