Big Reactor Fuel Controller and Controller On|Off 1.10.2

local component = require("component")

local rc = component.br_reactor

local Me = rc.getEnergyStored()

local FAM = rc.getFuelAmount()

local function nv()
        local FM = rc.getFuelAmount()
        ptt = (FM * 100) / FAM
    end

while true do
    nv()

    if ptt < 50 then
        rc.setActive(false)
    elseif ptt >= 51 then
        rc.setActive(true)
     end
    os.sleep(1)

local function lvl()
    local en = rc.getEnergyStored()
    pct = (en * 100) / Me
end

while true do
    lvl()

    if pct < 20 and rc.getActive() == false then
        rc.setActive(true)
    elseif pct >= 99 and rc.getActive() == true then
        rc.setActive(false)
    end
os.sleep(3)
end
end