pitch was made of white and green wool
seats made of blue wool
roof was made of cobblestone and the stairs also with cobblestone
as u can see their were a lot of torches used to light up the stadium
seats for the players were wooden stairs and covered with glass

i got help from 2 friends Ken Smurf and Linchie IRL

this was made in a survival mode NOT CREATIVE
you can aslo see it was built on xbox360 minecraft version