addEntity( new JointAttractor(this, (int)(width * 0.2), (int)(height * 0.7) ));
addEntity( new JointAttractor(this, (int)(width * 0.2), (int)(height * 0.8) ));
// repulsors
for (int i = 0; i < 3; i++)
addEntity(new BigRepulsor(this, rnd.nextInt(width), rnd
.nextInt(height)));
// goals
for (int i = 0; i < 5; i++)
addEntity(new GoalEntity(this, rnd.nextInt(width), rnd
.nextInt(height), i + 1), i * 300);