ready = false
function saveRoutinePosition(action)

	dataFile = fs.open("Data", fs.exists("Data") and "a" or "w")
	dataFile.write(action)
	dataFile.close()
end

function readRoutine()

	dataFile = fs.open("Data", "r")
	return dataFile.readAll()
end

function refuel()

	if(turtle.getFuelLevel() < turtle.getFuelLimit/2) then
		turtle.select(1)
		turtle.refuel()
	    end
end

function chestArea()

	for i = 5, 16 do
			turtle.select(i)
			turtle.dropDown()
		end
		turtle.select(4)
		while not turtle.compare() do
			turtle.turnRight()
		end
		turtle.select(1)
		turtle.suck(turtle.getItemSpace())
		turtle.select(4)
		turtle.suck(turtle.getItemSpace())
		turtle.turnRight()
		if not turtle.detect() then
		   turtle.place()
		end
		turtle.turnRight()
		if not turtle.detect() then
		   turtle.place()
		end



refuel()

if fs.exists("Data") then

	if readRoutine() == "checkWood" then
	ready = true
    end
else
	ready = true
end

while true do

	while ready do

	--Dig wood
	turtle.select(2)
	if not turtle.compare() then
		saveRoutinePosition("checkWood")
		nTurn = 0;
		while not turtle.compare() do
			if nTurn == 4 then
				if not turtle.detectUp() then
				saveRoutinePosition("reset")
				while not turtle.detectDown do
					turtle.down()
				end
				saveRoutinePosition("chestArea")
				chestArea()
				break end
			    end
			turtle.turnRight()
			nTurn = nTurn + 1;
		    end
	    else
		turtle.dig()
		turtle.turnRight()
		turtle.turnRight()
		turtle.dig()
		if turtle.digUp() then
			saveRoutinePosition("digUp")
		end
		turtle.up()
		saveRoutinePosition("checkWood")
	end

	if not ready and readRoutine() == "reset" then

		while not turtle.detectDown do
					turtle.down()
		end
		saveRoutinePosition("chestArea")
		chestArea()
		ready = true
	end

	if not ready and readRoutine() == "chestArea" then
		chestArea()
		ready = true
	end

	if not ready and readRoutine() == "digUp" then
		turtle.up()
		ready = true
	end

end