Infinite Placer

local outOfItems = false
while not outOfItems do
    while turtle.forward() and outOfItems == false do
        turtle.placeDown()
        if turtle.getItemCount() < 1 then
            local flag = false
            for i = 1, 16 do
                local data = turtle.getItemDetail(i)
                if data then
                    if data.name == "minecraft:dirt" then
                        turtle.select(i)
                        flag = true
                        break
                    end
                end
            end
            if flag == false then
                outOfItems = true
            end
        end
    end
    turtle.dig()
end