Fractal Phase Shift

This is what happens when I stay up all night rendering a fractal animation...
It starts as a fractal based on the cosine function, phase shifts to sine, then negative cosine, negative sine, and back, through a couple of cycles.
Zₙ₊₁ = π*(cos(Zₙ)*cos(t) + sin(Zₙ)*sin(t))
Where t = (time in seconds)*0.3

[@garyconrad4705]

Far out man.