function num_fmt(num)
    num = tostring(num)
    len = #num
    commas = string.format("%d", (len / 3))
    commas = tonumber(commas)
    first = -3
    second = -1
    formatted = num:sub(first,second)

    i = 0
    while i < commas do
        first = first - 3
        second = second - 3
        formatted = num:sub(first,second) .. "," .. formatted
        i = i + 1
    end
    return(formatted)
end

cap = peripheral.wrap("tile_blockcapacitorbank_name_1")
mon = peripheral.wrap("monitor_2")

capCount = 3

term.redirect(mon)
term.clear()

sizex, sizey = term.getSize()


while true do
    energy = cap.getEnergyStored()
    realEnergy = (energy * capCount)
    realEnergy = num_fmt(realEnergy)
    middle = ((sizex - #tostring(realEnergy)) / 2)
    term.setCursorPos(middle,1)
    print(realEnergy)
    sleep(1)
end