Ladybug ladybug;

void setup() {
  size(800,600);
  smooth();
  ladybug = new Ladybug(50);
}

void draw() {
  background(255);

  ladybug.display();
  ladybug.move();
}
 

class Ladybug {
  float diam;
  float theta=0;

  Ladybug(float tempDiam) {
    diam = tempDiam;
  }

  void display() {
    pushMatrix();
    rotate(theta);
    translate(400,300);

    fill(255,0,0);
    ellipse(0,0,diam,diam);
    popMatrix();
  }

  void move() {
    theta+=.01;
  }
}