Computercraft Powermon

maxpower = 0
powerstored = 0
prevpower = 0
powerdif = 0
m = peripheral.wrap("back")
batteries = {
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_0"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_1"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_2"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_3"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_4"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_5"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_6"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_7"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_8"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_9"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_10"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_11"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_12"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_13"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_14"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_15"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_16"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_17"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_18"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_19"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_20"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_21"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_22"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_23"),
  peripheral.wrap("tile_thermalexpansion_cell_resonant_name_24")
}

for i = 1,#batteries do
    maxpower = maxpower + batteries[i].getMaxEnergyStored()
end

while true do
  sleep(1)
  prevpower = powerstored
  powerstored = 0
  for i = 1,#batteries do
    powerstored = powerstored + batteries[i].getEnergyStored()
  end
  powerdif = math.ceil((powerstored-prevpower)/20)
  m.clear()
  m.setCursorPos(1, 1)
  m.setTextScale(2)
  m.write(" Bryceio's Power Monitor")
  m.setCursorPos(1, 3)
  m.write("RF Stored:")
  if m.isColor() and term.isColor() then
    if powerstored/maxpower < 1/3 then
      m.setTextColor(colors.red)
    elseif powerstored/maxpower >= 1/3 and powerstored/maxpower < 2/3 then
      m.setTextColor(colors.yellow)
    else
      m.setTextColor(colors.lime)
    end
  end
  m.setCursorPos(1, 4)
  m.write(powerstored.." ")
  if m.isColor() and term.isColor() then
    m.setTextColor(colors.white)
  end
  m.write("/ "..maxpower)
  m.setCursorPos(1, 6)
  m.write("RF/T:  ")
  if powerdif >= 0 then
    if term.isColor() and m.isColor() then
      m.setTextColor(colors.lime)
    end
    m.write("+"..powerdif)
  else
    if term.isColor() and m.isColor() then
      m.setTextColor(colors.red)
    end
    m.write(powerdif.." ")
  end
  if term.isColor() and m.isColor() then
    m.setTextColor(colors.white)
  end
end