print("+-------------------------------------+")
 print("|   Tree Farm made by Henkekalmar     |")
 print("+-------------------------------------+")
 print("|                                     |")
 print("| Before you start you must place a   |")
 print("| chest with saplings on the turtle's |")
 print("| left side, and en empty chest under |")
 print("| it for emptying wood.               |")
 print("| Place one log in the 2nd slot, fuel |")
 print("| in the 15th and a chest in the 16th |")
 print("|                                     |")
 print("+-------------------------------------+")
---------------------------------------
-- basic functions for turtle control -
---------------------------------------
local function gf()  while not turtle.forward()   do end end
local function gb()  while not turtle.back()      do end end
local function gu()  while not turtle.up()        do end end
local function gd()  while not turtle.down()      do end end
local function gl()  while not turtle.turnLeft()  do end end
local function gr()  while not turtle.turnRight() do end end
local function df()  turtle.dig()       end
local function du()  turtle.digUp()     end
local function dd()  turtle.digDown()   end
local function pf()  turtle.place()     end
local function pu()  turtle.placeUp()   end
local function pd()  turtle.placeDown() end
local function sf()  turtle.suck()      end
local function su()  turtle.suckUp()    end
local function sd()  turtle.suckDown()  end
local function Df()  turtle.drop()      end
local function Du()  turtle.dropUp()    end
local function Dd()  turtle.dropDown()  end
local function ss(s) turtle.select(s)   end
------Resetting itself 1.
ss(2) if turtle.compare() then df() du() gu() else du() gu() end
ss(2) if turtle.compare() then df() du() gu() end
ss(2) if turtle.compare() then df() du() gu() end
ss(2) if turtle.compare() then df() du() gu() end
ss(2) if turtle.compare() then df() du() gu() end
ss(2) if turtle.compare() then df() du() gu() end
ss(2) if turtle.compare() then df() du() gu() end
ss(2) if turtle.compare() then df() du() gu() end
------Resetting itself 2.
gd() gd() gd() gd() gd() gd() gd() gd() gd() gd()
ss(16) if turtle.compare() then os.sleep(0.2) else gr() end
if turtle.compare() then os.sleep(0.2) else gr() end
if turtle.compare() then os.sleep(0.2) else gr() end
if turtle.compare() then os.sleep(0.2) else gr() end
gr() ss(1) if turtle.detect() then os.sleep(0.2) else if pf() then os.sleep(0.2) else gl() sf(1) gr() pf() end end
------Detect growth/harvest
while true do
ss(1) if turtle.detect() then os.sleep(0.2) else if pf() then os.sleep(0.2) else gl() sf(1) gr() pf() end end
ss(2) if turtle.compare() then df() gu() gu() du() df() gu() du() df()
gu() du() df() gu() du() df() gu() du() df() gu() du() df() gu() df()
gd() gd() gd() gd() gd() gd() gd() gd()
------Refuelling
function checkFuel()
if turtle.getFuelLevel() <= 200
ss(15)
turtle.refuel(1)
end
end
------Dropping off items
ss(2) Dd(turtle.getItemCount(i) - 1)
gl() ss(1) Df() ss(3) Df() ss(4) Df() ss(1) sf() Dd(turtle.getItemCount(i) - 4)
------
end
end