import rhinoscriptsyntax as rs

allobjs = rs.AllObjects()
rs.DeleteObjects(allobjs)

bsize = 10              # side length of box
dist = 1                # distance between boxes
offs = bsize + dist     # offset of boxes
num = 10                # number of boxes in one row

corners = [(0,0,0), (bsize,0,0), (bsize,bsize,0), (0,bsize,0),
       (0,0,bsize), (bsize,0,bsize), (bsize,bsize,bsize), (0,bsize,bsize)]

rs.EnableRedraw(False)

#nur die Kanten

for i in range(num):
    for j in range(num):
        for k in range(num):
            if not ((0< i <9) and (0< j <9)):
                if not((0< i <9) and (0< k <9)):
                    if not((0< j <9) and (0< k <9)):
                        box = rs.AddBox(corners)
                        rs.MoveObject(box, (i*offs,j*offs,k*offs))
                        rs.ObjectColor(box,(i*(255/num),j*(255/num),k*(255/num)))