One of the excercises in the Greenfoot book refers to adding random behavior to worms place on world how does one add random behavior to stationary objects? addObject(new Worm(), 20, 500); addObject(new Worm(), 30, 200); addObject(new Worm(), 60, 90); addObject(new Worm(), 80, 310); addObject(new Worm(), 150, 50); addObject(new Worm(), 210, 410); addObject(new Worm(), 220, 520); addObject(new Worm(), 380, 330); addObject(new Worm(), 410, 270); addObject(new Worm(), 530, 30);