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At Hethrow airport, there is a rather unusual digital sculpture. It's five meters long and covered with 4638 flip-dots that create mesmerizing waves as they chase across the surface of the 'Cloud' that hangs from the ceiling.

Meet the team behind the sculpture, Eva Rucki and Sebastian Noel of Troika, a successful art and design studio in London.

Eva and Sebastian speak about breaking convention, and how they generate original ideas for projects such as 'Cloud'. They also discuss overcoming conceptual and technical problems that inevitably arise in every project.