Bead Field

@grid: 1 / 100% / #000;
@content: @pattern(
  d: 0;
  repeat(48) {
    p: vec3(rot(pos, t/4) * d, d + t);
    d: d + .7length(fract(p) - .5) - .1;
  }
  fill: ramp(d/12,
    #fff, #fd7 .1, #e46 .3, #07121f
  );
);