int    X = 30, Y = 30;
float  XX, YY, MM;

void setup()
{
  size(600, 600);
  frameRate(30);
  smooth();
  noStroke();

  XX =  width / X;
  YY = height / Y;
  MM = sqrt(width * width + height * height);
}

void draw()
{
  float  xc = XX / 2;
  
  background(0, 64, 64);
  for (int x = 0; x < X; x++, xc += XX)
  {
    float  side  = sqrt((XX * XX) / 2) / 2,
           yc    = YY / 2;

    for (int y = 0; y < Y; y++, yc += YY)
    {
      float ax =  width / 2 +  width / 2 * sin(3 * radians(frameCount) + PI / 2),
            ay = height / 2 + height / 2 * sin(4 * radians(frameCount));
            
      pushMatrix();
      
      translate(xc, yc);
      rotate(atan2(ay - yc, ax - xc));
      
      float  d = dist(xc, yc, ax, ay);
      float  s = sin(map(d, 0, MM / 5, PI / 2, -PI / 2));
      
      fill(255, noise(xc, yc) * (127 + 127 * s));
      
      quad(-side, -side, side, -side, side, side, -side, side);
      
      popMatrix();
    }
  }   
}