GUI with tables

-- Gui using tables by PaymentOption --
nSelect = 1

sMenuState = "MainMenu" -- This variable helps keep track of what menu you're on.
tMainMenu = { [1] = { label = "Option1", associatedFunction = Option1Func }, -- Format: { label = string, associatedFunction = function }
              [2] = { label = "Option2", associatedFunction = Option2Func }}; -- The label is to be displayed, and the
                                                                                -- Associated Function is what is executed upon pushing the button.
-- Tab markers in notepad++, you don't understand...
function clear() term.clear(); term.setCursorPos( 1, 1 ) end

function printScreen( tMenu )
    for i=1, #tMenu do
        if nSelect == i then print( "[ " .. tMenu[i].label .. " ]" )
        else                 print( "  " .. tMenu[i].label .. "  " ) end
    end
end

function Option1Func()
    term.setCursorPos( 1, 1 ); term.write( "OPTION 1 PRESSED" ); sleep( 2 )
end

function Option2Func()
    term.setCursorPos( 1, 2 ); term.write( "OPTION 2 PRESSED" ); sleep( 2 )
end


while true do
    clear()
    printScreen( tMainMenu )

    event, key = os.pullEvent( "key" )
    if sMenuState == "MainMenu" then
        if key == 200 and nSelect > 1 then nSelect = nSelect-1
        elseif key == 208 and nSelect < #tMainMenu then nSelect = nSelect+1
        elseif key == 28 then tMainMenu[nSelect].associatedFunction()
        end
    end
end