startup

reactor = peripheral.wrap("left")
monitor = peripheral.wrap("right")
monitor.setTextScale(1.5)
local function roundToNthDecimal(num, n)
 local mult = 10^(n or 0)
 return math.floor(num * mult + 0.5) / mult
end
local function controlRodInsertion()
    percentageEng = e / 100000
    controlRodIns = (roundToNthDecimal(percentageEng, 0) - 1)
    reactor.setAllControlRodLevels(controlRodIns)
end
local function main()
  reactorOn = reactor.getActive()
  os.sleep(0)
    e = tonumber(reactor.getEnergyStored())
    if  e > 9999999
      then reactor.setActive(false)
        return
      elseif e < 1000000
        then reactor.setActive(true)
          return
      end
  end
function monitorDisplay()
monitor.setCursorPos(22,1)
if e > 7500000
  then monitor.setTextColor(colors.green)
  elseif e < 7500000
    then monitor.setTextColor(colors.yellow)
  elseif e < 2500000
    then monitor.setTextColor(colors.red)
  end
monitor.write(tostring(e))
monitor.setCursorPos(24,2)
monitor.setTextColor(colors.white)
monitor.write(tostring(controlRodIns))
monitor.setCursorPos(23,3)
if reactorOn == true
  then
    monitor.setTextColor(colors.green)
    monitor.write("ON ")
   elseif reactorOn == false
     then
        monitor.setTextColor(colors.red)
        monitor.write("OFF")
   end
end
monitor.setTextColor(colors.white)
monitor.setCursorPos(1,1)
monitor.write("Current Power Level: ")
monitor.setCursorPos(1,2)
monitor.write("Control Rod Insertion: ")
monitor.setCursorPos(1,3)
monitor.write("Reactor Power Status: ")
while true do
main()
controlRodInsertion()
monitorDisplay()
end