class Chip {
  float angle, radius;  // position of the first chip, from center of window
  float sz;  // how big the chip is
  color clr;
  int symm;  // how many symmetry partners to display
  boolean on;  // display or not?

  // Turn on the chip, at angle a and radius r, of size z, and including s symmetry partners
  void place(float a, float r, int z, int s)
  {
    on = true;
    angle = a; 
    radius = r;
    sz = z;
    symm = s;
    clr = color(random(100,255),random(100,255),random(100,255),100);
  }

  // Draw the chip and its symmetry partners, rotated by the global angle.
  void draw(float globalAngle)
  {
    if (on) {
      fill(clr);
      pushMatrix();
      rotate(angle + globalAngle);
      // Draw main chip and symm copies, at equal rotations.
      for (int d=0; d<symm; d++) {
        rect(radius,0,sz,sz);
        rotate(TWO_PI/symm);
      }
      popMatrix();
    }
  }
}