Countdown App 2, with timer.performWithDelay() and transition.to()

gistfile1.lua

--CountDown App 2 
W=display.contentWidth/2
H=display.contentHeight/2
local time = 3  -- count down from 3 
local gogogo = display.newText("Go go go!", 0, 0, "James Fajardo", 100)
gogogo.alpha=0 --is not visible
gogogo.x=W
gogogo.y=H
local timeSound=audio.loadSound("button.wav")

local function decreaseTime()
   local count = display.newText(time.."", 0, 0, nil, 100)
   count.x=W
   count.y=H
   time = time-1
   transition.to(count, {time=1000, alpha=0} ) --fading the numbers away in 1000 miliseconds
   local channel = audio.play(timeSound)
   if(time==0) then   --delay is needed to wait for above transition.    
      transition.to(gogogo,  {time=1000, delay=1000, alpha=1} ) --making visible by setting alpha 1 with 1000 miliseconds delay and 
   end                 																																					--in 1000 miliseconds easing
end

timer.performWithDelay(1000,decreaseTime,3) --calls  decreaseTime 3 times with 1 second delay (3.parameter should be time variable's first value)