public GameObject rep;
    public GameObject noviDel;
    public GameObject zadniDel;

    public float stevec = 0;

    void  Dodaj (){
        if(zadniDel == null)
            zadniDel = gameObject;

        noviDel = (GameObject)Instantiate(rep, zadniDel.transform.position - zadniDel.transform.forward, new Quaternion(0,0,0,0));
        zadniDel.transform.rotation = zadniDel.transform.rotation;
        new HingeJoint joint = (GameObject)zadniDel.GetComponent(HingeJoint);
        if(joint != null) {
            joint.connectedBody = zadniDel.rigidbody;
            zadniDel = noviDel;
        }
        noviDel.name = "rep1 " + stevec;
        stevec++;

        rigidbody.mass++;
    }