|Members of the Vatican Fire Brigade construct the chimney on the top of the Sistine chapel which will emit smoke.|
After each vote ballots are burned. If a two thirds majority is reached and a Pope is successfully elected then white smoke is seen rising from the chimney above the Sistine Chapel. If the votes needed to elect a pope are not reached during that round of balloting then a chemical is added to the fire and a black smoke emerges. This tells the rest of the world watching from the outside that the Cardinals have not come to an aggrement.