Gloom

@grid: 1 / 100vw 100vh;
@content: @pattern(
  d: length(pos);
  a: atan(pos.y, pos.x);
  ma: abs(mod(a, π/3) - π/6);
  p: vec2(cos(ma), sin(ma)) * d;
  w: sin(12ma - .5t) + cos(16d - t);
  k: sin(3w + 10d - t);
  fill: match(
    k > .5, #f5ecd7,
    k > .35, #e76f51,
    k > -.5, #2a9d8f,
    #1d2d44
  );
);