while true do
	if os.pullEvent() == "redstone" then -- disregard non redstone events
		local b = rs.getBundledInput("left") -- make local copy of bundle input so we dont have to fetch it every time
		for k,v in pairs(colors) do -- iterate through colors table
			if colors.test(b, colors[v]) then -- test whether input is on for each color
				rs.setBundledOutput("back", v) -- if yes then set output to that color
			end
		end
	end
	sleep(0.25) -- to prevent spamming signals and forcing program to quit
end