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

pixels = W:1024 H:1024

x = from -40 to 40 W
y = from -40 to 40 H

t = 2

m = 2 * sin(t / 4)
n = 2 * sin(t / 9)
    
value = t * (sin(m*x) * sin(n*y) + sin(n*x) * sin(m*y))

c = sin(value) * 3.0

r = if (c > 0, c, -c - 1)
g = if (c > 0, c - 1.5, -c - 1.5)
b = if (c > 0, c - 2, -c)

