032

void main(){
    vec3 c = black;
    c += step(.5, fbm(vec2(phi(), phi()+speed.y * .05), 2)) * teal;
    c += step(.5, fbm(vec3(phi()*2., 2.*phi(), speed.x * .05), 4)) * yellow;
    gl_FragColor= vec4(c, 1.0);
}