[Kamog]

Do you think you can put an additional mirror at the focal point of the 16 you already set up, so that now you can use the 17th mirror to direct the beam in different directions? You just turn the extra mirror around to move the beam to different targets.

I'm not sure if this would work because the light beams may diverge again after being reflected.... There must be a way to keep the beams parallel, like using a convex mirror or using a lens or something.