startup

local r = peripheral.wrap("back")
local m = term
m.clear()
while true do
  local er = r.getEnergyStored() / 10000000
  if er > 1 then
    er = 1
  end
  r.setAllControlRodLevels(math.ceil(er*100))
  m.setCursorPos(1,1)
  m.write(string.sub("  "..(100-math.ceil(er*100)).."%",-4))
  sleep(1)
end