Olympic symbols rings are five interlocking rings, coloured blue, yellow, black, green, and red on a white field, known as the "Olympic rings". The symbol was originally designed in 1912 by de Coubertin. He appears to have intended the rings to represent the five continents: Europe, Asia, Africa, Oceania, and America. According to Coubertin, the colours of the rings together with the white of the background included the colours composing every competing nation's flag at the time. Upon its initial introduction, Coubertin stated the following in the August 1912 edition of "Olympique": In his article published in the "Olympic Revue" the official
Olympic Games bout, but his receipt of the prize money raised suspicion. In the early 20th century, many Olympic athletes began using drugs to improve their athletic abilities. For example, in 1904, Thomas Hicks, a gold medallist in the marathon, was given strychnine by his coach. The only Olympic death linked to performance enhancing occurred at the 1960 Rome games. A Danish cyclist, Knud Enemark Jensen, fell from his bicycle and later died. A coroner's inquiry found that he was under the influence of amphetamines. By the mid-1960s, sports federations started to ban the use of performance-enhancing drugs; in 1967 the IOC