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The centerpiece of the British game show Turnabout was a grid with 16 spheres of varying colors. It was up to the contestants to manipulate the spheres so as to produce a pre-chosen color, with points awarded for the number of spheres used. But before being given the opportunity to "tackle" the grid, the players had to answer questions and solve clues. Created by Clive Doig, Turnabout aired on BBC1 from 1990 to 1996.