void FixedUpdate()
{
Vector3 jointPos = transform.TransformPoint(joint.anchor);
Vector2 jointXZ = new Vector2(jointPos.x, jointPos.z);
Vector3 massPos = GetComponent <Rigidbody>().worldCenterOfMass;
Vector2 massXZ = new Vector2(massPos.x, massPos.z);
float displacement = Vector2.Distance(jointXZ, massXZ);
joint.AddTorque(-Physics.gravity.y * displacement * GetComponent <Rigidbody>().mass * 1.001f);
}
