Turtle Place Scaffold

-- pastebin get PRXT4dBc placeScaff

local selected = 1
local itemCount = turtle.getItemCount(selected)

turtle.select(selected)

os.startTimer(1)

while true do
	redstone.setOutput("left", false)

	-- Check item count
	if itemCount == 0 then
		-- Out of items; Switch cells
		selected = selected + 1
		turtle.select(selected)
	end

	if turtle.detectDown() == false then
		-- Place scaffold and signal activator
		turtle.placeDown()
		redstone.setOutput("left", true)
	end

	os.pullEvent("timer")
	os.startTimer(1)
end