Lumberjack Turtle 2.4.2-dev

--"Lumberjack Turtle" v2.4-dev
-- Author: Daniele "Raniel" Sabre

-- configuration
woodToUseForFuel = 1 -- higher number = less wood produced but more sustain (set 0 to deactivate)
minFuelRequired = 20
wait = 5
slotWood = 1
slotsBoneMeal = {5, 6, 7, 8}
slotsSaplings = {9, 10, 11, 12}
slotCompare = 16

print("Lumberjack started")
print("[hold ctrl+t to terminate]")

turtle.select(slotCompare)

counterLoop = 0
continue = true

while turtle.getFuelLevel() > minFuelRequired and continue do -- if the fuel gets below  the loop stops
    -- increment counter
    counterLoop = counterLoop + 1

    -- compare the sapling with the block in front of the turtle
    while turtle.compare() do
        -- bone meal action
        for k, v in pairs(slotsBoneMeal) do
            data = turtle.getItemDetail(v)

            if data then
                if data.name == "minecraft:dye" then
                    turtle.select(v)
                    turtle.place()
                    turtle.select(slotCompare)

                    break
                end
            end
        end

        sleep(wait)
    end

    -- init procedure to get wood from tree
    turtle.select(slotWood)
    turtle.dig()
    turtle.forward()

    -- the turtle will keep going up until there are no more blocks above him
    while turtle.detectUp() == true  do
        turtle.digUp()
        turtle.up()
    end

    -- go down
    while turtle.down() == true do
    end

    -- until it hits the ground
    turtle.back()

    -- place a new sapling
    found = false
    for k, v in pairs(slotsSaplings) do
        data = turtle.getItemDetail(v)

        if data.name == "minecraft:sapling" then
            turtle.select(v)
            turtle.place()
            found = true -- sapling found

            break
        end
    end

    -- if no sapling are found this is the last cycle
    if not found then
        continue = false
    end

    -- select the slot of the wood
    turtle.select(1)

    -- use  of wood to refuel turtle
    if woodToUseForFuel > 0 then
        turtle.refuel(woodToUseForFuel)
    end

    turtle.dropDown() -- dropDown the remain woods

    -- reselect slot compare
    turtle.select(slotCompare)

    print("Cycle "..counterLoop.." completed")
end

-- if the turtle runs out of fuel, it will print a message and terminate the program
print("Empty fuel or saplings not found")