No idea as I have not used those commands before, but I asked ChatGPT and this is what it came back with:
The text you selected is an iRule that logs a message to the local0 facility every 10 seconds after a client connection is accepted. The message logged is "Time!!!". The iRule works fine when there is only one session. However, when multiple sessions are opened, multiple timers are started and logging occurs multiple times. It is not possible to have just one timer across all sessions to use periodic logging just once.