What are the rules to ultimate frisbee?

Ultimate Frisbee is a lot like football. There are two teams comprised of an equal number of players. The game is usually played on a football field so each team begins in their designated endzone (the field canbe shortened by determining the end zones as certain yard lines). One tea begins with the frisbee and yells out ULITMATE! before launching it to the other team (a lot like a kick off). Once a player of the other team has the frisbee they are only allowed to pivot on one leg (they're not permitted to take any steps) from here, they must throw the frisbee to another player on the team. This continues until a member of the team catches the frisbee in the end zone in which that team scores a point and the process starts over. However, if the frisbee is dropped it makes it an automatic recovery for the other team and the game continues, the same with an interception. If a frisbee is thrown out of bounds it is taken up by the other team from where it left the playing field. The game is over when a certain team has reached the designated amount of points (voted prior to the beginning of the game) or a team forfeits.