charcoal

--Variables
sap = 1 --Sapling slot
bone = 2 --Bone meal slot
fuel = 3 --Fuel slot
sChest = 4 --Sapling chest slot
bChest = 5 --Bone meal chest slot
fChest = 6 --Fuel chest slot
dump = 7 --Item export chest slot
fuelLevel = turtle.getFuelLevel()
sapLevel = turtle.getItemCount("sap")
boneLevel = turtle.getItemCount("bone")
--Functions

function plant()
  turtle.select("sap")
  turtle.place()
end

function grow()
  turtle.select("bone")
  turtle.place()
end

function chop()
   while turtle.detectUp() do
   turtle.digUp()
   turtle.up()
end

function resetPos()
  while not turtle.detectDown() do
   turtle.down()
end

function dump()
  turtle.select("dump")
  turtle.place()
  turtle.select(3)
  turtle.drop()
  turtle.select(8)
  turtle.drop()
  turtle.select(9)
  turtle.drop()
  turtle.select(10)
  turtle.drop()
end

function getSap()
 if sapLevel < 16 then
  turtle.select("sChest")
  turtle.place()
  turtle.select("sap")
  turtle.suck()
  turtle.select("sChest")
  turtle.dig()
end

function getBone()
  if boneLevel < 16 then
  turtle.select("bChest")
  turtle.place()
  turtle.select("bone")
  turtle.suck()
  turtle.select("bChest")
  turtle.dig()
end

function fuelUp()
 if fuelLevel < 100 then
 turtle.select("fChest")
 turtle.place()
 turtle.select("fuel")
 turtle.suck()
 turtle.refuel()
 turtle.select("fChest")
 turtle.dig()
end

--Main Program
while true do
    turtle.getSap()
    turtle.fuelUp()
    turtle.getBone()
    turtle.plant()
    turtle.grow()
    turtle.dig()
    turtle.forward()
    turtle.chop()
    turtle.resetPos()
    turtle.back()
    turtle.dump()
    os.sleep(180)
end