float xx , yy;
float Cx , Cy;
float Angle;
float R;

void setup(){
  size(500,500);
  background(0);
  colorMode(RGB,256);
  noStroke();
  frameRate(30);

  Cx = width / 2;
  Cy = height / 2;
  Angle = 60;
  R = 360;
}

void draw(){
  fadeToWhite();

  Angle += 3;
  xx = Cx + (R * sin(radians(Angle)) );
  yy = Cy + (R * cos(radians(Angle)) );

  int x = int(random(width));
  int y = int(random(height));
  int sz = int(random(40));
  int angle = 1;
  int x_margin = 1;

  translate(-150,460);

  for(int i=680 ; i > 0 ; i--){

    fill(randomRGBColor());
    smooth();
    pushMatrix();
    translate(i*x_margin,150-i);
    rotate(radians(i*angle));
    rect(xx,yy,sz/10,sz/10);
    popMatrix();
  }
}

color randomRGBColor(){
  color c = color(random(256),random(256),random(256));
  return c;
}

void fadeToWhite(){
  rectMode(CORNER);
  fill(0,2);
  rect(0,0,width,height);
}