function makeScafoldFromPlank()
		-- make 12 stick from 3-3 plank
		turtle.select(1);
		turtle.transferTo(5,3);
		turtle.craft();
		-- make 64 scafold with those stick
		-- place stick
		turtle.select(2);
		turtle.transferTo(9,4);
		turtle.transferTo(6,4);
		turtle.transferTo(11,4);
		-- place plank
		turtle.select(1);
		turtle.transferTo(2,4);
		turtle.transferTo(3,4);
		-- craft scafold
		turtle.craft();
end;

function makeScafoldFromLog()
	print("lets make fuel");
	-- first empty the inventory
	for i=1,16 do
		turtle.select(i);
		turtle.dropUp();
	end;
	turtle.select(1);

	-- take some log
	turtle.suckDown();
	cnt = turtle.getItemCount(1);
	-- if not enough
	if (cnt < 9) then
		turtle.dropDown();
		os.sleep(30)
		return false;
	else
		-- drop back exceeding
		if cnt > 9 then
			turtle.dropDown(cnt-9);
		end;
		-- start crafting
		-- convert all log in plank
		turtle.craft();
		makeScafoldFromPlank();
		-- place in front chest
		turtle.select(2);
		turtle.drop();
		makeScafoldFromPlank();
		-- place in front chest
		turtle.select(1);
		turtle.drop();
	end;
	return true;
end;

while(makeScafoldFromLog()) do
  print("makin scaffold");
end;