change wibox widgets

[david cobac]

Hi, i'm new with awesome
i'd like to change wibox widgets with this kind of code :

--
ilw = 1
myWiboxWidgets = {
   {cputw,},
   {batw, },
   {gputw,}
}
function changeWidgets ()
   ilw =  ( ilw %  #myWiboxWidgets ) + 1
   mywibox.widgets = myWiboxWidgets[ilw]
end
--

but the third time i change, the wibox is and stay empty.
What am i doing wrong ?

awesome v3.4.11

-- 
Cordialement
                           David Cobac