of those colors on Jackson's 1987 album Bad; his personality was based on then-presidential candidate and later President of the United States Bill Clinton's "Get it done" attitude during the 1992 presidential campaign. To help sell the idea to Sega's higher-ups, Ohshima pitched the concept framed by a fictional fighter pilot that had earned the name "Hedgehog" due to his spiky hair, and had decorated his plane with images of Sonic. When this pilot retired, he married a children's book author, who wrote stories about the Sonic character, the first which became the plot for the first Sonic game; Ohshima stated that this influence can be seen in the logo of the game, which features Sonic in a pilot's wing emblem. The origins of Sonic can be traced farther back to a tech demo created by Yuji Naka, who had developed an algorithm that allowed a sprite to move smoothly on a curve by determining its position with a dot matrix. Naka's original prototype was a platform game that involved a fast-moving character rolling in a ball through a long winding tube, and this concept was subsequently fleshed out with Oshima's character design and levels conceived by designer Hirokazu Yasuhara. Sonic was created without the ability to swim because of a mistaken assumption by Yuji Naka that all hedgehogs could not do so. A group of fifteen people started working on the first Sonic the Hedgehog game, and renamed themselves Sonic Team. The game's soundtrack was composed by Masato Nakamura of the band Dreams Come True. Sega sponsored the group's "Wonder 3" tour, painting Sonic on the tour bus, distributing pamphlets advertising the game, and having footage of the game broadcast above stage prior to its release. The original concepts gave Sonic fangs and put him in a band with a human girlfriend named Madonna. However, a team from Sega of America, led by Madeline Schroeder, who calls herself "Sonic's mother," "softened" the character up for an American audience by removing those elements. This sparked a heated issue with Sonic Team. Naka later admitted that it was probably for the best. Sonic's appearance varies greatly depending on the medium and the style in which he is drawn. In the video games, Sonic's original design by Ohshima was short and round, with short quills, a round body, and no visible irises. Artwork featuring this design and drawn by Akira Watanabe was