The Time in [seconds|milliseconds] blocks don’t work exactly the way you have programmed them here.
This block will return the remaining time on your Timer’s interval.
So if your Timer’s interval is 5 seconds, this block will count down 4, 3, 2 1, 0.
If your timer’s interval is 1s, and you show this value when the timer fires, it will always show 0, as there are 0 seconds remaining on the Timer.
Here is an example of how your Timer could be set up, and how you would work with it in the blocks:
You can see a project that demonstrates how to use these blocks here
This is now explained in the Timer docs. Thanks for asking about it!