how to make fixtures of 25 teams by knockout fixture method...how to give bye....and how to divide the teams accordingly???? n also wat does this seeding means ?????...when does a team become seeded???

First bye is given to the last team of lower half and second bye is given to the first team of upper half, third bye is given to the first team of lower half and fourth bye is given to the last team of upper half and soon on...