oscRect

float r,r2,r3;
float s = 80;
float sz, sz2, sz3;
float theta, theta2, theta3;
boolean saveAnim = false;
float frm;
int actRandomSeed = 0;

void setup() {
  size(500, 500);
  background(#202020);
  fill(#202020, 100);
  stroke(255);
  r = random(TAU);
  r2 = random(TAU);
  r3 = random(TAU);
}

void draw() {

  randomSeed(actRandomSeed);

  sz = map(sin(theta), -1, 1, 20, 100);
  sz2 = map(sin(theta2), -1, 1, 30, 200);
  sz3 = map(sin(theta3), -1, 1, 50, 300);

  pushMatrix();
  translate(width*.75, height*.75);
  rotate(r);
  rect(s-sz/2, 0, sz, sz, 10);
  popMatrix();

  pushMatrix();
  translate(width/3, height/3);
  rotate(r2);
  rect(s, 0, sz2, sz2, 10);
  popMatrix();

  pushMatrix();
  translate(width/2, height/2);
  rotate(r3);
  rect(s+sz3/2, 0, sz3, sz3, 10);
  popMatrix();

  r += TAU/90;
  r2 -= TAU/90;
  r3 +=TAU/90;

  theta += TAU/90;
  theta2 += TAU/90;
  theta3 += TAU/90;

  if (saveAnim) {
    if (frameCount % 3 == 0 && frameCount < frm+91) saveFrame("image-###.gif");
  }
}

void keyPressed() {
  saveAnim = true;
  frm = frameCount;
}

void mousePressed() {
  actRandomSeed = (int) random(100000);
  setup();
}