The Olympic flag is made up of a white background at the centre of which there are five coloured intertwined rings: blue, yellow, black, green and red. The blue, black and red rings are on the upper part pf the flag, with the green and yellow ones on the lower part, forming together a regular trapezium. It first appeared in 1914, during the 20th anniversary of the re launch of the games. However, it had to wait until the 1920 games in Antwerp to be run up the flagpole for the first time.According to tradition, this should happen at the opening ceremony. However, it was impossible to carry out this innocuous task during the winter games at Saint Moritz in 1928, because the pulley broke and could not be repaired in time.The flags of the victorious nations are also hoisted during the presentation of medals to the winners.Another tradition has also been added to the Olympics: it is today customary for the victor of an event to do a lap of honour, with the flag of their country draped around their shoulders. However, when the American boxer Georges Foreman, gold medallist at the Mexico games, brandished the his countries flag in the ring, his action had political motivations: he wanted to make a stand against the "black power" movement which was whipping up a storm in the black community in the United States. Finally, on the point of flags, the sad spectacle of the Olympic flag decked out with swastikas fluttering over the Berlin games in 1936 should be remembered.