A spirograph-type curve such as would be obtained by rolling around the inside of a superellipse (major axis = 4 and minor axis = 2, exponent = 4) a circle with radius 0.407 for three revolutions, the drawing point being on the circle's perimeter.
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Roulette curve 31 free icon was designed by Firkin for icons Png and presented to its users.
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4/2/2018