Power system - FTB

--pastebin code: G47j7rDW

local bridge = peripheral.wrap("left")
local net = peripheral.wrap("back")

bridge.clear()

local width = 100

local storageUnits = {
    {
        ["id"] = "tile_thermalexpansion_cell_resonant_name_0",
        ["name"] = "Main#1"
    },
    {
        ["id"] = "tile_thermalexpansion_cell_resonant_name_1",
        ["name"] = "Main#2"
    },
    {
        ["id"] = "tile_thermalexpansion_cell_resonant_name_2",
        ["name"] = "Main#3"
    }
}

local offset = 0
for key, storageUnit in pairs(storageUnits) do
    if net.getTypeRemote(storageUnit["id"]) == "tile_thermalexpansion_cell_resonant_name" then
        pxOffset = offset * 20
        storageUnit["label"] = bridge.addText(4, 4 + pxOffset, storageUnit["name"], 0xffffff)
        storageUnit["bar"] = bridge.addBox(4, 14 + pxOffset, 0, 5, 0xCC0000, 0.9)
        storageUnit["bar"].setZ(2)
        storageUnit["bg"] = bridge.addBox(4, 14 + pxOffset, width, 5, 0x000000, 0.5)
        storageUnit["num"] = bridge.addText(4, 24 + pxOffset, "0/0", 0xffffff)
        storageUnit["percent"] = bridge.addText(0 + bridge.getStringWidth(storageUnit["name"]), 4 + pxOffset, "##%", 0xffffff)
        offset = offset + 2
    end
end

while true do
    for i=#storageUnits,1,-1 do
        storageUnit = storageUnits[i]
        if net.isPresentRemote(storageUnit["id"]) then
            if net.getTypeRemote(storageUnit["id"]) == "tile_thermalexpansion_cell_resonant_name" then
                t = peripheral.wrap(storageUnit["id"])
                capacity = t.getMaxEnergyStored("")
                amount = t.getEnergyStored("")
                storageUnit["bar"].setWidth(width / capacity * amount)
                perc = math.floor(amount/capacity * 100)
                tCap = tostring(capacity)
                tAmt = tostring(amount)
                tPerc = tostring(perc)
                storageUnit["num"].setText(tAmt.."/"..tCap)
                storageUnit["percent"].setText(tPerc.."%")
            end
        else
            if net.getTypeRemote(storageUnit["id"]) == "tile_thermalexpansion_cell_resonant_name" then
                storageUnit["bar"].delete()
                storageUnit["bg"].delete()
                storageUnit["label"].delete()
                storageUnit["num"].delete()
                storageUnit["percent"].delte()
                table.remove(storageUnits, i)
            end
        end
    end
    sleep(0.5)
end