Aurel, thank you for getting in touch with your question! And sorry for my delayed response.

There are many ways to repeat the timer. To give you the best answer it would help me to have a bit more information: do you want it to repeat only one additional time (so 20 seconds then another 20 seconds) or do you want the ability to repeat the timer multiple times?

Let me know what your ideal goal is for repeating the timer and I will walk you through a few options.