Average power for the last clock hour

[Rune]

I couldn't understand how to transform that to a script that could be useful, so I googled lua average value and found this in another thread:

-- storage key
key = 'temp_average'
-- time between average value send (in seconds)
maxtime = 60 * 60
-- resulting average value
result = '4/3/34'

time = os.time()

data = storage.get(key)
if not data then
  data = { values = {}, time = time }
end

value = event.getvalue()
table.insert(data.values, value)

delta = time - data.time
if delta >= maxtime or delta < 0 then
  storage.delete(key)

  avg = 0
  count = #data.values
  for _, value in ipairs(data.values) do
    avg = avg + value
  end

  grp.write(result, avg / count)
else
  storage.set(key, data)
end

Is there a way to make this start the count at the beginning of the clock hour?