float x, y, w, h;
int totalShapeCount = 1000;

void setup() {
  size(600, 600);
  background(200, 200, 0);
  smooth();
  int i = 0;
   
  stroke(255, 50);
  while(i<totalShapeCount) {
    drawRandomRect();
    i += 1;
  }
  
  stroke(0, 50);
  for (i=0; i<totalShapeCount; i+=1) {
    drawRandomCircle();
  }

}

void drawRandomRect() {
    fill(random(255),random(255), random(255), 50);
    x = random(width);
    y = random(height);
    w = random(5, 100);
    h = random(5, 100);
    rect(x, y, w, h);
}

void drawRandomCircle() {
    fill(random(255), 50);
    x = random(width);
    y = random(height);
    w = random(5, 100);
    h = random(5, 100);
    ellipse(x, y, w, h);
}