How to eliminate a gap of an offset in a corner So I need to build a layer with offset bricks, which I have managed to figure out. However, the corner is a problem. The dark bricks in my pic need to be in that position. How do I fill the gap between them around the corner? I'm assuming i will need to use a headlight brick but how? 
(I have managed to work out what to do in straight line, but now the corner is a problem. 


Update:

Thanks, that makes sense, it was the half spaces I was wondering about. A bad attempt at clarifying but here it goes.
UPDATE: Attempt Number Two.


Okay, everything's set up almost like your first uploaded image:


Stone Gray 1x2 jumper plates as the base is the same.
The three Black 1x1 Bricks are still in those key positions, except they're all modified Headlight Bricks, instead.
All bricks have been skewered through with a combination of Light
Sword Blades and Shafts.


LEGO Digital Draw won't allow placement of a brick on a stud-less surface.  To get around this I used 1x12 and 1x6 plates for temporary
staging, and then deleted them after the shish kebabbing.


There's still a gap, but the gap number has been reduced to one, and
made less noticeable.





Let me know if anyone wants the build file (Minus Picasso's Junk Lighthouse behind it.).