This is my code:
last_time = get_last_time()
now = time.time() - last_time
minute =
seconds =
print 'Next time you add blood is '+minute+':'+seconds
Because recovery blood every 5 minutes so only need minute and second.
This is basic time arithmetics...if you know that a minute has 60 seconds then you could have found that yourself:
minute = now // 60
seconds = now % 60
Or if you want integers (discarding fractional seconds),
minute = int(now // 60)
seconds = int(now % 60)