Display time of object

[nmedalacabeza]

Code:

-------------------------------------------------------------------------- value = event.getvalue() key_curr = 'ontime_curr' out_curr = '33/1/31' key_total = 'ontime_total' out_total = '33/1/30' time = storage.get(key_curr) now = os.time() if value then   if not time then     storage.set(key_curr, now)     formattime(out_curr, 0)   end else   if time then     time_total = storage.exec('incrby', key_total, now - time)     formattime(out_total, time_total)         storage.delete(key_curr)   end   grp.update(out_curr, '') end ---- ---- resident------------------------------- key_curr = 'ontime_curr' out_curr = '33/1/31' key_total = 'ontime_total' out_total = '33/1/30' time_curr = storage.get(key_curr) if time_curr then     time_curr = os.time() - time_curr   formattime(out_curr, time_curr)     time_total = storage.get(key_total, 0)   formattime(out_total, time_total - time_curr) -- negative placement end

Hello, it counts backwards but it doesn't keep the value that I have wrong? Could you put the hours to be subtracted in a group address?
Thank you