old_startup

local p = peripheral
local r = p.wrap("back")
local old = 0.0

while true do

  local stored_rf = r.getEnergyStored()
  local max_rf = 10000000
  local percent = (stored_rf / max_rf)* 100

  if old == percent then
  --gay
  else
    print(string.format("%.2f%%", percent))
    old = percent
  end

  if percent > 75 then
    r.setActive(false)
  elseif percent < 25 then
    r.setActive(true)
  end
  sleep(1)

end