To indicate the change of rotation in a closed system as "not light that turns back on itself" but as the rotational fullness of a system in reverse rotation compared to our own systems rotation is not the dark light but the need to indicate the direction by the triple negative angle of rotation as the x exponent and then to indicate the distance to the rotational system by the 100 exp R as the 100 % range of the percentage of the systems rotational power to keep on rotating either in the positive direction of or the negative, there is no dark rotation ,you simply forget to switch the relations of the 2 objects and make comparisons of one being ahead of the other when in fact they are all rotating with the same multiples of any direction.