Attributed to Cliff Pickover Graphics by Paul Bourke February 2004 See also Peter de Jong attractors Contributions from Thomas Burt and Paul Richards. Definition xn+1 = sin(a yn) + c cos(a xn) yn+1 = sin(b xn) + d cos(b yn) where a, b, c, d are variabies that define each attractor. a = -1.4, b = 1.6, c = 1.0, d = 0.7 a = 1.1, b = -1.0, c = 1.0, d = 1.5 a = 1.6, b = -0.6, c = -1.2, d = 1.6 a