Modulated fibonacci sequence visualization in Processing

fibonacci.pde

float turnFraction = (1 + sqrt(5))/2;
int numPoints = 3000;

void setup()
{
  size(1000, 1000);
  noStroke();
  fill(255);
  frameRate(30);
}

void draw()
{
  turnFraction = sin(millis() / 1000000.0f);
  float coloring = cos(millis()/3333.3f);
  background(127 - coloring * 127);
  fill(127 + coloring * 127);
  pushMatrix();
  translate(500, 500);
  for(int i = 0; i < numPoints; ++i)
  {
    float dst = pow(i / (numPoints - 1f), sin(millis()/5000.0f)) * 256 - 256 * sin(millis() / 10000.0f);
    float angle = TWO_PI * turnFraction * i;
    float x = dst * cos(angle);
    float y = dst * sin(angle);
    circle(x, y, 3 - 1.5 * coloring);
  }
  popMatrix();
}