i = 1

for i = 1, 16 do
	turtle.select(i)
		if turtle.refuel(0) then
			turtle.refuel()
		end
	end
end

turtle.select(2)

while not turtle.detectUp() do
	if turtle.getItemCount(i) <= 0 then
		turtle.select(i + 1)
		i = i + 1
	end
	turtle.up()
	turtle.placeDown()
end