import rhinoscriptsyntax as rs
import random as ran

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

bsize = 10
dist = 1
offs = bsize + dist
num = 20

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)

for i in range (num):
    for j in range(num):
        for k in range(num):
            myran = ran.randint(0,9)
            if (myran > 2):
                if ((i+j+k)%5) and ((i+j)%3) and ((j+k)%2) and ((i-j+k)%4):
                    box = rs.AddBox(corners)
                    rs.MoveObject(box, (i*offs,j*offs,k*offs))
            else:
                box = rs.AddBox(corners)
                rs.MoveObject(box, (i*offs,j*offs,k*offs))
                rs.ObjectColor(box, (255,255,0))
rs.EnableRedraw(True)