import bpy
layer2=(False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False)
for i in range(-5,5):
    for j in range(-5,5):
        for k in range(-5,5):
            bpy.ops.mesh.primitive_plane_add(radius=0.2, view_align=False, enter_editmode=False, location=(0, 0, 0), layers=layer2)

import bpy
layer2=(False, True, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False, False)
for i in range(-5,5):
    for j in range(-5,5):
        for k in range(-5,5):
            bpy.ops.mesh.primitive_plane_add(radius=0.2, view_align=False, enter_editmode=False, location=(0, 0, 0), layers=layer2)
            #So we've just added one more plane.
            #While we're here, select the just-created object
            #Then, change the object's color, transparency, tell it to be shadeless, etc