int squareCount = 100;
ColorSquare squares[] = new ColorSquare[squareCount];

void setup() {
  size(512, 512);
  for (int i = 0; i < squares.length; i++) {
    float r = random(100);
    if (r < 10) {
      squares[i] = new ColorSquare(random(width), random(height), 100);
    }
    else if (r < 20) {
      squares[i] = new ColorSquare(random(width), random(height), 10);
    }
    else {
      squares[i] = new ColorSquare(random(width), random(height),
        random(25, 50));
    }
  }
}

void draw() {
  background(255);
  for (int i = 0; i < squares.length; i++) {
    squares[i].update();
    squares[i].render();
  }
}