Well done! Prototyping is an iterative process...even when you have a finished product, you can still find ways to make improvements. Consider what happened in 1966, during the first broadly televised World Cup games. With four hundred million fans watching, a problem became apparent: the ball, which was reddish brown, was hard to see and follow on TV. By the time of the 1970 World Cup, a new ball called the Telstar had been developed—one with a black and white checkered design that was easier for both players and TV viewers to see. The new design also made the ball more spherical, which in turn made it move in more predictable ways—something the players liked. While this iconic design is still familiar to most of us, the design of the ball has continued to evolve and improve since then!