farmTrees.lua

brokenTrees = 0

function clearMonitor ()
    term.clear()
    term.setCursorPos(1,1)
end

function centerCursor(strSize)
	local x, y = term.getCursorPos()
	local width, height = term.getSize()
	term.setCursorPos(math.floor((width - strSize) / 2) + 1, y)
end

function checkTree ()
    local has_block, data = turtle.inspect()

    if data.name == "ars_nouveau:red_archwood_log" then
        return true
    else
        return false
    end
end

function sendPulse ()
    redstone.setOutput("back", true)
    os.sleep(0.5)
    redstone.setOutput("back", false)
end

function getSaplings ()
    while (not turtle.suckDown() and not lookForSaplings()) do
        clearMonitor()
        print("No saplings found. Checking again...")
    end

    updateMonitor()
end

function lookForSaplings ()
    for i=1, 16 do
		turtle.select(i)
		local currentItem = turtle.getItemDetail(i)

        if currentItem ~= nil then
            if (currentItem.name == "ars_nouveau:red_archwood_sapling") then
                return true
            end
        end
	end

    return false
end

function updateMonitor ()
    titleString = "===== Tree Farmer MK I ====="
    clearMonitor()
    centerCursor(#titleString)
    print(titleString)

    print("\nHi! I'm the Tree Farmer, courtesy of Bongo!\n")
    print("Please do not take items from me or the chest under me.\n\n")
    print("Trees harvested today: " .. brokenTrees)
end

updateMonitor ()
while (true) do
    if checkTree() then
        brokenTrees = brokenTrees + 1
        sendPulse()
        os.sleep(3)
        getSaplings()
        turtle.place()
    end
end