example_love.lua

-- function goes here somewhere

function love.load()
	sprites = {}
	numberOfSprites = 62
	spriteLoadIterator = num_iter(1, numberOfSprites)
	spriteLoadProgress = 0
	spritesLoaded = false
end

function love.update(dt)
	if not spritesLoaded then
		local n = spriteLoadIterator()
		if n then
			sprites[n] = love.graphics.newImage(n..".png")
			spriteLoadProgress = n
		else
			spritesLoaded = true
		end
	else
		-- sprites loaded, do game stuff
	end
end

function love.draw()
	if not spritesLoaded then
		love.graphics.print("Loading sprites: "..spriteLoadProgress.."/"..numberOfSprites, 50, 50)
	else
		-- draw game stuff
	end
end

num_iter.lua

function num_iter(s, e)
	local i = s - 1
	return function()
		i = i + 1
		if i <= e then
			return i
		end
	end
end