powerbar

local lamps = {}
for _, n in pairs(peripheral.getNames()) do
    local num = tonumber(n:match "colorful_lamp_(%d+)")
    if num then lamps[num] = peripheral.wrap(n) end
end
local numlamps = #lamps

local cell = peripheral.find "rftoolspower:cell3"

local function get_level()
    return cell.getRFStored() / cell.getRFCapacity()
end

while true do
    local lvl = get_level()
    local on_color = 31744
    local off_color = 0
    if lvl > 0.2 then
        on_color = 32736
    end
    if lvl > 0.5 then
        on_color = 992
    end
    for index, periph in pairs(lamps) do
        local place = index / numlamps
        if place < lvl then
            periph.setLampColor(on_color)
        else
            periph.setLampColor(off_color)
        end
    end
    sleep(1)
end