The most popular time for the polka pattern was in the 1950s. Women at that time loved to wear fluffy knee-length skirts, and patterns with white dots on a black background were their first choice. The famous Japanese avant-garde artist Yayoi Kusama is a super supporter of polka dots. She has mental problems and once said a famous saying to praise the greatness of polka dots: "The earth is just one of millions of polka dots. One!"