trying to create a status bar in hammerspoon

bar.lua

-- Trying to make a status bar
-- Internaught 11/11/15

-- Something about the screens ...

-- I guess this draws a border?
-- local boxBorder = 2

-- Lets draw the box, on as many screens as we have, across the top
for _,screen in ipairs(hs.screen.allScreens()) do
        local x, y = screen:position()
        local frame = screen:frame()
        local box = hs.drawing.rectangle(hs.geometry.rect(frame.x, frame.y, frame.w, 25))
        box:setFillColor({["red"]=0.1,["blue"]=0.1,["green"]=0.1,["alpha"]=1}):setFill(true):show()
-- Create all the stuff we want displayed
-- iTunes / Now Playing
        local artist = hs.itunes.getCurrentArtist()
        local album = hs.itunes.getCurrentAlbum()
        local track = hs.itunes.getCurrentTrack()
        local iTunes = string.format("%s - %s - %s", artist, album, track)
        local timer = hs.timer.doEvery(3, function()
                text:setText(string.format("%s - %s - %s", artist, album, track))
        end)
        timer:start()
-- Let's define how the text is displayed
        local text = hs.drawing.text(hs.geometry.rect(frame.x + 2, frame.y + 2, frame.w -2, 20), iTunes)
-- Set the text color
        text:setTextColor({["red"]=1,["blue"]=1,["green"]=1,["alpha"]=1})
-- Set the font size and font type
        text:setTextSize(14)
        text:setTextFont('Tamzen7x14')
-- Show it off
        text:show()
end



-- timer stopped to prevent repeated notifications of error.
/Users/yuppie/.hammerspoon/bar.lua:22: attempt to index a nil value (global 'text')
stack traceback:
	/Users/yuppie/.hammerspoon/bar.lua:22: in function </Users/yuppie/.hammerspoon/bar.lua:21>
stack traceback:
-- timer stopped to prevent repeated notifications of error.
/Users/yuppie/.hammerspoon/bar.lua:22: attempt to index a nil value (global 'text')
stack traceback:
	/Users/yuppie/.hammerspoon/bar.lua:22: in function </Users/yuppie/.hammerspoon/bar.lua:21>
stack traceback:
-- timer stopped to prevent repeated notifications of error.
/Users/yuppie/.hammerspoon/bar.lua:22: attempt to index a nil value (global 'text')
stack traceback:
	/Users/yuppie/.hammerspoon/bar.lua:22: in function </Users/yuppie/.hammerspoon/bar.lua:21>
stack traceback: