import rhinoscriptsyntax as rs 
allobjs=rs.AllObjects()
rs.DeleteObjects(allobjs)

bsize=10           #side lenght of box
dist=2             #distance between boxes
offs=bsize+dist    #offset of boxes
num=16             #number of boxes in row

#create a box
corners = [(0,0,0), (10,0,0), (10,10,0), (0,10,0), (0,0,10), (10,0,10), (10,10,10), (0,10,10)]

for i in range(num):
    for j in range(num):
        for k in range(num):
            if ((i+j+k)%5) and ((i-j+k)%3) and ((i+j-k)%3) and ((i-j-k)%5):
                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)))