Changing code dosen't do anything

Hi, everytime i try to change the code of my event, nothing happends. If i write something, for example displaying an image. 

I will put my code below, my problem is down at the bottom of the code, keep scrolling down until you see the bold text.

local composer = require(“composer”)

local scene = composer.newScene()

function scene:create(event)

local sceneGroup = self.view

local function Button2Copy(event)

function back(event)

composer.gotoScene(“socialscene”)

end

local function s21e(event)

    if ( “began” == event.phase ) then    

    local black = display.newImage(“black.png”)

    black.x = display.contentCenterX

    black.y = display.contentCenterY

    local soc = display.newImage(“social7.png”)

    soc.x  = display.contentCenterX

    soc.y = display.contentCenterY

    soc.height = 1000 

    soc.width = 1428

    end

end

local widget = require(“widget”)

     s21 = widget.newButton(

    {

        width = 582,

        height = 413,

        defaultFile = “social6back.png”,

        overFile= “social6back.png”,

        onEvent = s21e

    }

)

– Center the button

s21.x = display.contentCenterX - 610

s21.y = display.contentCenterY - 230

____________________________________________________________________________________

It’s down here that removing or adding code and saving dosen’t do anything when you run the app, except if you write something that won’t work then you get an error

local function s31(event)

    if ( “began” == event.phase ) then    

    local black2 = display.newImage(“black.png”)

    black2.x = display.contentCenterX

    black2.y = display.contentCenterY

    local soc2 = display.newImage(“social8.png”)

    soc2.x  = display.contentCenterX

    soc2.y = display.contentCenterY

    soc2.height = 1000

    soc2.width = 1428

    local widget = require(“widget”)

     back = widget.newButton(

    {

        width = 250,

        height = 50,

        defaultFile = “backpick.png”,

        overFile= “backpick.png”,

        onEvent = back

    }

)

– Center the button

back.x = display.contentCenterX

back.y = display.contentCenterY

end

end

_____________________________________________________________________________________

You have set up a function called s31, but never call it (at least in the code we can see here).

The code

[lua]

s31()

[/lua]

Will run the function.

You have set up a function called s31, but never call it (at least in the code we can see here).

The code

[lua]

s31()

[/lua]

Will run the function.