Basic Minecraft Reactor and Ender Cell Manager

allNames = peripheral.getNames()
monitor = peripheral.wrap("top")

monitor.setCursorPos(1, 1)
monitor.clear()
monX, monY = monitor.getSize()
monitor.setTextScale(0.5)
monitor.setTextColor(43)
monitor.setCursorBlink(true)
monitor.write("Starting...")
monitor.setCursorPos(1, 2)

function write(msg)
    curX, curY = monitor.getCursorPos()
    monitor.write(msg)
    if curY == monY then
        monitor.scroll(1)
        monitor.setCursorPos(1, monY)
    else
        monitor.setCursorPos(1, curY + 1)
    end
end

function getReactorName()
    for x = 1, #allNames do
        if string.match(allNames[x], "_Reactor_") then
            return allNames[x]
        end
    end
end

function getCellName()
    for x = 1, #allNames do
        if string.match(allNames[x], "ender_cell") then
            return allNames[x]
        end
    end
end

reactorName = getReactorName()
enderCell = getCellName()

if reactorName == nil and enderCell == nil then
    write("Can't find 'Bigger Reactors' reactor or 'Powah' Ender Cell")
    exit()
else
    write("Found reactor and Cell")
end

reactor = peripheral.wrap(reactorName)
cell = peripheral.wrap(enderCell)
prevCellLevel = cell.getEnergy() / cell.getEnergyCapacity()

function monitorPower()
    while true do
        currentRodPercent = reactor.getControlRod(0).level()
        cellLevel = cell.getEnergy() / cell.getEnergyCapacity()
        cellLevelRounded = cellLevel * 100
        cellLevelRounded = math.floor(cellLevelRounded)
        write("Battery level: " .. cellLevelRounded .. "%")

        if cellLevelRounded ~= 100 then
            if cellLevel > prevCellLevel then
                if currentRodPercent == 99.9 then
                    write("Can't push anymore")
                else
                    reactor.setAllControlRodLevels(currentRodPercent + .1)
                    write("Pushing rods, " .. currentRodPercent + .1 .. "%")
                end
            else
                reactor.setAllControlRodLevels(currentRodPercent - 1)
                write("Pulling rods, " .. currentRodPercent - 1 .. "%")
            end
        else
            reactor.setAllControlRodLevels(99.9)
            write("Setting rods to 99.9%")
        end

        prevCellLevel = cellLevel

        sleep(30)
    end
end

monitorPower()