Chop Script

--- Chop v.2.0 by DumperJumper(dumperjumper.com) from 09.02.16

-- Turtle expects a Chest behind it to put wood in and
-- a chest on the right for Saplings
--
-- Layout:
--  SS        S=Sapling
--  SS        T=Turtle
--   TC       C=Chest
--   C

local checkInterval = 20    -- Seconds the Turtle waits before next check if a Tree has grown
local height = 0            -- Needed in Runtime
local tree = true           -- Needed in Runtime
local wait = 0              -- Needed in Runtime

local function refuel()
    if turtle.getFuelLevel() < 100 then
        turtle.select(1)
        turtle.refuel(1)
    end
end

--MOVEMENT-FUNCTIONS

local function forward()
    refuel()
    turtle.forward()
end

local function back()
    refuel()
    turtle.back()
end

local function down()
    refuel()
    if turtle.detectDown() then
        turtle.digDown()
    end
    turtle.down()
    height = height - 1
end

local function up()
    refuel()
    if turtle.detectUp() then
        turtle.digUp()
    end
    turtle.up()
    height = height + 1
end

--MOVEMENT-END

local function plantSapling()
    if turtle.getItemCount(2) < 1 then
        print("Could not replant Tree, Sapling in Slot 2 are missing")
    else
        turtle.select(2)
        turtle.place()
    end
end

local function replant()
    plantSapling()
    turtle.turnLeft()
    back()
    plantSapling()
    turtle.turnRight()
    plantSapling()
    back()
    plantSapling()
end

local function manageItems()
    turtle.turnLeft()
    turtle.turnLeft()

    for i=3, 16 do
        turtle.select(i)
        if not turtle.compareTo(2) then
            turtle.drop()
        end
    end

    turtle.turnLeft()

    for i=3, 16 do
        turtle.select(i)
        turtle.drop()
    end

    while turtle.getItemCount(2) < 8 do
        turtle.select(2)
        if not turtle.suck() then
            print("NOOOO!!! NO MOAR SAPLINGS! *killed himself*")
            turtle.turnLeft()
            os.shutdown()
        end
    end

    turtle.turnLeft()
end

while true do

    while tree do
        turtle.dig()
        if height == 0 then forward() end
        turtle.dig()

        tree = turtle.detectUp()

        up()
    end

    turtle.turnLeft()
    forward()
    turtle.turnRight()

    while height > 0 do
        down()
        turtle.dig()
    end

    print("Done felling Tree")
    print("Replanting...")

    replant()

    manageItems()

    print("Waiting for new Tree to grow...")

    while not tree do
        os.sleep(checkInterval)
        up()
        tree = turtle.detect()
        down()
        wait = wait + 1
    end

    print("WOAH new Tree! That took " .. wait*checkInterval .. " seconds!")

    height = 0
    wait = 0
end