box1 = peripheral.wrap("tile_thermalexpansion_cell_basic_name_12")
box2 = peripheral.wrap("tile_thermalexpansion_cell_basic_name_11")
box3 = peripheral.wrap("tile_thermalexpansion_cell_basic_name_10")
monitor = peripheral.wrap("monitor_116")

function round(a,b)
  local m = 10^(b or 0)
  return math.floor(a * m + 0.5) / m
end

function maxStored(box)
  return box.getMaxEnergyStored()
end

function stored(box)
  return box.getEnergyStored()
end

function percentage(box)
  return round((stored(box) * 100) / maxStored(box), 2)
end

function start()
  print("Running energy system")
  monitor.write("Loading...")

  while true do
    monitor.clear()
    monitor.setCursorPos(1,1)
    monitor.write("Energy stored in the energy cells")
    monitor.setCursorPos(1,2)
    monitor.write("----------------------")
    monitor.setCursorPos(1,3)
    monitor.write("Box 1: "..stored(box1).."/"..maxStored(box1).." - "..percentage(box1).."%")
    monitor.setCursorPos(1,4)
    monitor.write("Box 2: "..stored(box2).."/"..maxStored(box2).." - "..percentage(box2).."%")
    monitor.setCursorPos(1,5)
    monitor.write("Box 3: "..stored(box3).."/"..maxStored(box3).." - "..percentage(box3).."%")
    sleep(2.5)
  end
end

start()