My Reactor Code 2

--This code is designed to leave the reactor on all the times and maintain
--power levels by adjusting the control rod insertion

--return a integar ignoring any remainder
function DIV(a,b)
    return (a - (a % b)) / b
end

--the total size of the buffer
local BUFFER_MAX = 10000000
--the amount of power we want to maintain in the buffer
local TARGET_AMOUNT = 5000000
--the default insertion of control rods
local controlLevel = 50

--connect to reactor
local reactor = peripheral.wrap("back")

--confirm connection
if(not reactor.getConnected) then
    print("Not connected to Reactor")
end

--turn the reactor on
if(not reactor.getActive()) then
    reactor.setActive(true)
    print("Starting Reactor")
end

--move control rod to defaul level
reactor.setAllControlRodLevels(controlLevel)

while(true) do
    --control the rods to maintain a specified buffer

    --find the current amount of energy in the buffer
    local currentEnergy = reactor.getEnergyStored()
    --set the new control level to the difference between the
    --amount of evergy and wanted energy
    local number = (currentEnergy - TARGET_AMOUNT)

    if (number > 0) then
        controlLevel = controlLevel + 5
    elseif(number < 0 ) then
        controlLevel = controlLevel - 5
    end

    if (controlLevel < 0) then
        controlLevel = 0
    elseif (controlLevel > 100) then
        controlLevel = 100
    end
    reactor.setAllControlRodLevels(controlLevel)

    --Check reactor
    if(reactor.getFuelAmount() == 0)then
        redstone.setOutput("right", true)
        print("Control Rods complety Open")
    elseif (controlLevel == 100) then
        redstone.setOutput("right", true)
        print("Control Rods complety Inserted")
    end

    sleep(3)
end