Need help for function command

Hello Sir,

how to call one function inside another?

actually i have 3 different function.....

in first function i want to call another function like as blow... 

local function getAltar()

while true do

local t = Timer()

if exists("altar.png", 5) then

toast("altar Found after: " .. t:check())

getLastMatch():highlight(3)

click(getLastMatch())


startAltar function should start from here... how can i call that function here? 

end



-- pick a random move

local direction = math.random(1, #move)

toast(direction)

swipe(move[direction][1], move[direction][2])

wait(3)

end

end



--


local startAltar = function()



wait(2)

click(Location(215,910))

wait(5)

click(Location(530,1185))

wait(5)

click(Location(375,1185))

wait(2)



if exists(insufficientResourcesInfo) then

keyevent(4)

wait(2)

keyevent(4)

wait(2)

click(Location(695,1230))

wait(3)

click(Location(580,1225))

wait(3)

click(Location(645,200))

wait(3)

click(Location(500,290))

wait(3)

click(Location(175,850))

wait(3)

keyevent(4)

wait(3)

keyevent(4)

wait(2)

click(Location(695,1230))

wait(1)

getAltar()


else

getAltar()



end

end



-- start altar function



startAltar()