Engine clutch

function getnumbersfromtext(txt)
	local str = ""
	string.gsub(txt, "%d+", function(e) str = str .. e end)
	return str;
end

function main()
	while true do
		text = target.getLine(1)
		amount = tonumber(getnumbersfromtext(text))
		if amount ~= oldAmount then
			print(amount)
			oldAmount = amount
		end

		if amount == 147456 then
			redstone.setOutput(clutchSide, false)
			redstone.setOutput("front", false)
		else
			redstone.setOutput(clutchSide, true)
			redstone.setOutput("front", true)
		end
		sleep(0.2)
	end
end

oldAmount = -1
target = peripheral.wrap("back")
clutchSide = arg[1]
main()