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(1)
boneLevel = turtle.getItemCount(2)
--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
end
function resetPos()
  while not turtle.detectDown() do
   turtle.down()
end
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
end
function getBone()
  if boneLevel < 16 then
  turtle.select("bChest")
  turtle.place()
  turtle.select("bone")
  turtle.suck()
  turtle.select("bChest")
  turtle.dig()
end
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
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()
    sleep(180)
end