filling up an irregular volume

Hello,

I was wondering if someone could help me with filling up an irregular volume with units as in the attached picture. the blue points are supposed to line up with other blue points, and the green points with other green points.I am trying to create something like

in the picture posted by John Mirtschin on December 2 in:

http://www.grasshopper3d.com/forum/topics/cubic-packing

but then with the