local totalCap = 0
local totalStore = 0
local percent = 0
local mfsu

os.startTimer(1)

while true do
  totalCap = peripheral.call("back", getEUCapacity())
  totalStore = peripheral.call("back", getEUStored())

  -- Calculate a percentage
  percent = math.ceil(totalStore / totalCap) * 100

  -- Analogue redstone output
  redstone.setAnalogOutput("right", (math.ceil(totalStore / totalCap) * 15))

  os.pullEvent("timer")
  os.startTimer(1)
end