what i ended up with from today’s shader workshop!

the_force_2020_5M_23D_19H_49m_32s.frag

// giant circle owo
float circ(vec2 p) {
  return length(p - 0.9) - 0.1;  
}

// cycle thru color via cosine function
vec3 cosPalette( float t, vec3 a, vec3 b, vec3 c, vec3 d ) {
  return a + b*cos( 6.28318*(c*t+d) );
}

void main () {
  //position in center
  vec2 position = uv(); 
  vec2 positionN = uvN(); 
  
  float swirler = log(length(position)) * .5;
    
  // create our giant circle and scale position
  float shape = circ( position * vec2(0.4));
    
  // variables to pass through cosPalette function
  vec3 brightness = vec3(0.5,0.5,0.5);
  vec3 contrast = vec3(0.5,0.5,0.5);
  vec3 osc = vec3(1.0,1.0,1.0);
  vec3 phase = vec3(0.0,0.33,0.67);

  // determine color via custom vars in cosPalette function
  vec3 colourRainbow = cosPalette(time/12.0, brightness, contrast, osc, phase);

  // color this puppy
  colourRainbow = vec3(shape) * colourRainbow;
  
  // swirly noise
  vec2 p = vec2(sin(positionN.x * 1.0),swirler);
  float v = abs(snoise(time/100.0 + p * 8.0 + 2.0 )) * -1.3 + 1.6;
  
  // make some bloobs
  vec3 bloob = vec3(0.034,0.098,0.990);
  
  position = rotate(position, vec2(0.), time/300.0);
  float f = voronoi(position * 8.0 * bands.y + time) ;
  bloob+= step(bands.y, f) * magenta;
    
  position = rotate(position, vec2(0.01), time/12.0);
  float f2 = voronoi((position) * 200.0 * bands.z + time);
  bloob+= step(bands.z, f2) * colourRainbow;

  position = rotate(position, vec2(0), time/30.0);
  float f3 = voronoi(position * 6.2 * bands.w + vec2(0,time*2.50));
  bloob+= step(bands.w, (v * 1.1) * f3) * vec3(1.000,0.581,0.929);

  gl_FragColor = vec4(bloob, 1.0);
}

here’s the minimal version!

// giant circle owo
float circ(vec2 p) {
  return length(p - 0.9) - 0.1;  
}

// cycle thru color via cosine function
vec3 cosPalette( float t, vec3 a, vec3 b, vec3 c, vec3 d ) {
  return a + b*cos( 6.28318*(c*t+d) );
}

void main () {
  //position in center
  vec2 position = uv(); 
  vec2 positionN = uvN(); 
  
  float swirler = log(length(position)) * .5;
    
  // create our giant circle and scale position
  float shape = circ( position * vec2(0.4));
    
  // variables to pass through cosPalette function
  vec3 brightness = vec3(0.5,0.5,0.5);
  vec3 contrast = vec3(0.5,0.5,0.5);
  vec3 osc = vec3(1.0,1.0,1.0);
  vec3 phase = vec3(0.0,0.33,0.67);

  // determine color via custom vars in cosPalette function
  vec3 colourRainbow = cosPalette(time/12.0, brightness, contrast, osc, phase);

  // color this puppy
  colourRainbow = vec3(shape) * colourRainbow;
  
  // swirly noise
  vec2 p = vec2(sin(positionN.x * 1.0),swirler);
  float v = abs(snoise(time/100.0 + p * 8.0 + 2.0 )) * -1.3 + 1.6;
  
  // make some bloobs
  vec3 bloob = vec3(0.034,0.098,0.990);
  
  position = rotate(position, vec2(0.1), time/4.0);
  float f = voronoi(position * 0.9 + time/4.0);
  bloob += step(0.8, v + f) + colourRainbow;
  
  gl_FragColor = vec4(bloob, 1.0);
}