97.frag

uniform float time;
uniform vec2 resolution;
out vec4 fragColor;

vec2 rotate(vec2 matrix, float angle) {
    return vec2(matrix.x * cos(radians(angle)), matrix.x * sin(radians(angle))) + vec2(matrix.y * -sin(radians(angle)), matrix.y * cos(radians(angle)));
}

void main() {
    vec2 st = gl_FragCoord.xy / resolution.xy;
    st = st * 1. - 0.5;
    st.y *= resolution.y / resolution.x;
    vec2 rr = rotate(st, cos(time * 1.0) * 180.0);
    vec2 rg = rotate(st, cos(time * 1.4) * -180.0);
    vec2 rb = rotate(st, sin(time * 1.6) * 180.0);
    vec3 col = vec3(0.0);
    col.r = length(abs(rr) - sin(time * 2.0) * 0.2);
    col.g = length(abs(rg) - cos(time * 2.1) * 0.22);
    col.b = length(abs(rb) + sin(time * 2.2) * 0.24);
    col = mod(col * 20.0, 1.8);
    fragColor = TDOutputSwizzle(vec4(col, 1.0));
}