Yellow threads::3 Yellow, threads, Jean Leon Gerome, high - contrast::2 Minimal::2 Chris Foss, golden ratio, x( t) = A* cos( a* t) * cos( t) + A* sin( b* t) * cos( t) and y( t) = A* cos( a* t) * sin( t) + A* sin( b* t) * sin( t) , where 'A', 'a', and 'b' are constants, and 't' ranges from 0 to 2π::1 --ar 2:3 --s 50