#https://www.shadertoy.com/view/ltl3WH

pixels = W:1024 H:1024

x = from -4 to 4 W
y = from -4 to 4 H

t = 0.865
px = x
py = y

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

w = px*px + py*py
px = abs(px)/w - t
py = abs(py)/w - t

r = px
g = py
b = py - px
