noise

// original code from Matt Pearson

float xstart, ystart, squaresize;

void setup() {
  size(400, 400);
  background(150);
  xstart = random(10);
  ystart = random(10);
  squaresize = height/8;
}

void draw() {
  background(20);
  noStroke();

  //stroke(0);
  fill(150);

  xstart += 0.02;
  ystart += 0.01;

  translate(width/2, height/2);
  float ynoise = ystart;
  for (float y = -squaresize; y <= squaresize; y+=3) {
    ynoise += 0.02;
    float xnoise = xstart;
    for (float x = -squaresize; x <= squaresize; x+=3) {
      xnoise += 0.02;
      drawPoint(x, y, noise(sin(xnoise), cos(ynoise)));
    }
  }

  //if (frameCount%3==0 && frameCount < 314) saveFrame("image-####.gif");
}

void drawPoint(float x, float y, float noiseFactor) {
  pushMatrix();
  translate(x * noiseFactor * 4, y * noiseFactor * 4);
  float edgeSize = noiseFactor * 10;
  ellipse(0, 0, edgeSize, edgeSize);
  popMatrix();
}