Timer and Text?

Getting Started Newbie Questions
#1

How can i display a text after 30 seconds???

#2 
local function displayMyText() local myText = display.newText("My text!", display.contentWidth \* 0.5, display.contentHeight \* 0.5, native.systemFont, 12); end timer.performWithDelay(30000, displayMyText);
#3

[lua]
local function showText()
local myText = display.newText(…)
end

timer.performWithDelay(30000, showText)

[/lua]

#4 
local function displayMyText() local myText = display.newText("My text!", display.contentWidth \* 0.5, display.contentHeight \* 0.5, native.systemFont, 12); end timer.performWithDelay(30000, displayMyText);
#5

[lua]
local function showText()
local myText = display.newText(…)
end

timer.performWithDelay(30000, showText)

[/lua]