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

pixels = W:1024 H:1024

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

time = 0.0

radius = sqrt(x*x + y*y)

a = atan2(y, x)
n = 2
dis = 0.35 + 0.2*cos(atan2(y,x)*n + time*2.4)
k = smoothstep(dis, dis+0.3, radius)

r = 0.44*k + smoothstep(0.25, 0.89, dis)
g = 0.4*k + smoothstep(0.25, 0.89, dis)
b = 0.9*k
