On the instrument panel, a graphic depicted each of the cars around us as a white rectangle and tracked its movement relative to ours.

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The practice spawned a protest movement known as the "blue buckets", where people stuck buckets to the roof of their cars to imitate the lights.

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Tom Wolfe, in a famous 1963 Esquire story about custom cars, later expanded into a book, called Roth the Salvador Dali of the movement.

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