Big Reactor Controller Standalone

updateTime = 0.5
controllerSide = "back"
reactorMaxEnergy = 10000000
reactorBuffer = 0.5 -- in percent

local Args = {...}
if Args[1] == "update" then
	programName = shell.getRunningProgram()
	print("Updating.")
	fs.delete(programName)
	shell.run( "pastebin","get", "wA9943b8", programName )
	print("Finished updating.")
	error()
end

c = peripheral.wrap("back")
updateTimer = os.startTimer(updateTime)
if reactorMaxEnergy - reactorBuffer < 0 then error("Reactor buffer too high") end

function updateReactor()
	energyStored = c.getEnergyStored() / reactorMaxEnergy
	energyBuffered = c.getEnergyStored() / (reactorMaxEnergy - (reactorMaxEnergy * reactorBuffer))
	if energyStored > 1 then energyStored = 1 end
	 -- Set rod levels compared to stored energy.
	 -- E.g. 0% energy stored = 100 rod level, 100% = 0 rod level.
	rodLevel = math.min(100, energyBuffered * 100)
	print("Energy: " .. energyStored)
	print("Rod level: " .. rodLevel)
	c.setAllControlRodLevels(rodLevel)
	c.setActive(true)
end


while true do
	event, p1, p2 = os.pullEvent()
	if event == "timer" and p1 == updateTimer then
		updateReactor()
		updateTimer = os.startTimer(updateTime - 0.05) -- Takes 1 tick
	end
end