rotation

float r = 0;

void setup() {
  size(600, 600);
  background(255);
  smooth();
}
void draw() {
  stroke(0, random(0, 100));
  fill(random(50, 255), 0, 0);
  rotate(r);
  float circle_size = random(5, 20);
  ellipse( 2+r, 10, circle_size, circle_size);
  fill(random(50, 255), 0, random(50, 255));
  ellipse( 300 +r, 10, circle_size, circle_size);
  fill(random(50, 255), 0, 255);
  ellipse( 500 +r, 10, circle_size, circle_size);
  r = r + 0.1;
}


void keyPressed() {
  if (key == 's') {
    save("normal.png");
    exit();
  }
}