#https://www.shadertoy.com/view/XsXSz2

pixels = W:1024 H:1024

x = from -0.5 to 0.5 W
y = from -0.5 to 0.5 H

t = 56.29

angle = atan2(y,x)/(2.0*PI)
angle = if(angle <0.0, angle+1, angle)
dis = length2(x, y)

dis = dis*(1.0+ sin(angle*2.0*PI*20.0) * 0.1)
color = sin(dis*PI*35.0 - t*23.3)

r = 0.1*color
g = r
b = color

