tree

local tArgs = { ... }

local size = 4

local height = 0

local function unload()
	print( "Unloading items..." )
	for n=2, 16 do
		turtle.select(n)
		turtle.drop()
	end
	turtle.select(1)
end

local function done()
	if size == 1 then
		for i=height, 1, -1 do
			turtle.down()
		end
		turtle.back()
		turtle.turnLeft()
		turtle.turnLeft()
		unload()
		turtle.turnLeft()
		turtle.turnLeft()
	else
		turtle.back()
		turtle.turnLeft()
		turtle.forward()
		turtle.turnLeft()
		unload()
		turtle.turnLeft()
		turtle.turnLeft()
	end
end


-- Check for fuel (use charcoal in first slot)
	local fuelLevel = turtle.getFuelLevel()
        if fuelLevel == "unlimited" then
                return true
        elseif fuelLevel < 96 then
		turtle.refuel(1)
	end

-- Start the harvest
	turtle.dig()
	turtle.forward()

	if size == 1 then
		while turtle.detectUp() do
			turtle.digUp()
			turtle.up()
			height = height + 1
		end
		done()
	else
		turtle.dig()
		while turtle.detectUp() do
			turtle.digUp()
			turtle.up()
			turtle.dig()
			height = height + 1
		end

		turtle.turnRight()
		turtle.dig()
		turtle.forward()
		turtle.turnLeft()
		turtle.dig()
		for i=height, 1, -1 do
			turtle.digDown()
			turtle.down()
			turtle.dig()
		end
		done()
	end