Basic Cubic

    float t;        xyz p0;
    xyz anchor0;    xyz p1;
    xyz anchor1;    xyz p2;
    xyz handle0;    xyz p3;
    xyz handle1;    xyz p4;
    xyz r;

    private void Update()
    {
        p0 = xyz.Lerp(anchor0, handle0, t);
        p1 = xyz.Lerp(handle0, handle1, t);
        p2 = xyz.Lerp(handle1, anchor1, t);
        p3 = xyz.Lerp(a, b, t);
        p4 = xyz.Lerp(b, c, t);
        r = xyz.Lerp(d, e, t);
        t += Time.deltaTime * 0.25f;
        //4 seconds for full circle
        //draw lines between all points
    }