I can't see where the confusion is here. 1 is 1 second 10, 20 30 are fractions of a second, I.e. 1/10, 1/20, 1/30.... another clue is that if it has a "after it it is full seconds, without is fractions of a second.and what is 10,20,30 is that .10 .20 seconds? 1.25 is 1.25 seconds?