treeFarm 1.1.2

local t = turtle

local function forward(x)
    for i = 1, x do
        t.forward()
    end
end

local function rTurn(x)
    for i = 1, x do
        t.turnRight()
    end
end

local function lTurn(x)
    for i = 1, x do
        t.turnLeft()
    end
end

local function up(x)
    for i = 1, x do
        t.up()
    end
end

local function down(x)
    for i = 1, x do
        t.down()
    end
end

local function back(x)
    for i = 1, x do
        t.back()
    end
end

local fuelAmount = t.getFuelLevel()

local function fuelCheck()
    if fuelAmount < 5000 then
        back(3)
        os.sleep(5)
        rs.setOutput("left", true)
        os.sleep(5)
        rs.setOutput("left", false)
        t.select(3)
        t.refuel(all)
        forward(3)
        --t.print("Gassed up and good to go!")
    else
        t.print("Still Rollin!")--
    end
end

local itemCheck1 = t.getItemCount(1)
local itemCheck2 = t.getItemCount(2)

local function bonemealCheck()
    t.select(2)
    if itemCheck2 < 10 then
        back(3)
        rs.setOutput("back", true)
        os.sleep(15)
        rs.setOutput("back", false)
        forward(3)
    else
        --os.print("Ready to Bone")--
    end
end

local function saplingCheck()
    t.select(1)
    if itemCheck1 < 5 then
        back(3)
        rs.setOutput("right", true)
        os.sleep(5)
        rs.setOutput("right", false)
        forward(3)
    else
        --os.print("It's time to Lay")--
    end
end

local function readyCheck()
    saplingCheck()
    bonemealCheck()
    fuelCheck()
end

local function grow()
    t.select(2)
    while t.place() do
        t.place()
    end
end


local function plant()
    t.select(1)
    t.place()
end

local function harvest()
    t.dig()
    for i = 1, 15, 1 do
        t.digUp()
        up(1)
    end
    down(15)
    back(1)
end

while true do
    readyCheck()
    plant()
    grow()
    Harvest()
end