local function padLeft(str, w)
  return string.rep(" ", w - #str) .. str
end

--[[
* Locate the nearest
]]
local function findPeripheral(_type)
  for _,name in pairs(peripheral.getNames()) do
    if peripheral.getType(name) == _type then
      return peripheral.wrap(name)
    end
  end
end


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())
  end

  -- 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