- n = time:secsTo(ref)
 - n = time:msecsTo(ref)
 
SYNOPSIS
DESCRIPTION
    Calculates the difference between two time values.
  
   RETURN VALUE
    The time difference between ref and time in seconds or milliseconds, respectively.
  
   ERRORS
    Raises an error if time or ref is not a time instance.
  
   EXAMPLE
> 
> 
> 
      t1 = clock.newTime(10, 30, 0)
t2 = clock.newTime(12, 30, 0)
print(t1:secsTo(t2))
     7200