Cable?

shader.frag

precision mediump float;

uniform vec2 u_resolution;
uniform float u_time;

const float PHI = 1.6180339887;
const float TAU = 6.28318530718;

vec3 palette( float t ) {
  vec3 a = vec3(0.5, 0.5, 0.5);
  vec3 b = vec3(0.5, 0.5, 0.5);
  vec3 c = vec3(1.0, 1.0, 1.0);
  vec3 d = vec3(0.0, 0.15, 0.3);
  return a + b*cos(TAU*(c*t+d) );
}

void main() {
  vec2 uv = gl_FragCoord.xy / u_resolution;
  uv -= 0.5;
  uv.x *= u_resolution.x / u_resolution.y;

  vec2 uv0 = uv;

  vec3 o = vec3(0.0);

  for (float i = 0.0; i < 4.0; i++) {
    uv = fract(uv * 0.5) - .5;
    float d = length(uv) * exp(-length(uv0));
    vec3 c = palette(length(uv0) + i * .4 + u_time / 8.0);

    float r = length(uv0);
    float a = atan(uv0.y, uv0.x);
    float s = sin(a * 8. - r * (sin(u_time)));

    d = sin(d * (16. * (sin(u_time / 2.0) + 1.0)) + u_time) / 8.;
    d = abs(d + s / 5.0);
    d = pow(0.01 / d, 1.2);

    o += (c * (d));
  }

  gl_FragColor = vec4(o, 1.0);
}