#https://www.shadertoy.com/view/4dXfD2

pixels = W:1024 H:1024

x = from -1.0 to 1.0 W
y = from -1.0 to 1.0 H

t = 1.0

a = atan2(y, x) + sin(t)*3
l = length2(x, y)*0.088
g = smoothstep(-0.95, -0.05, cos(a*8))*0.06
k = 1.0-smoothstep(g-0.02,g+0.03, l)

r = k
g = k
b = k
