SCRIPT knock

Hey guys!
I’m new to using Mikrotik, and still working on some issues.
I need help creating a script.
The idea is when a specific user uses a knockport, it will be included in an ex list. “Released”.
That’s where the script comes in! I would need a script that identifies that there is a new occurrence in the released list, and executes another script, which in this case I have already managed to do, but just so you know, it is to release an openvpn user.
So the idea is that the user makes a certain knock and I activate the openvpn user, which is always deactivated at a certain time for security.

I would be grateful if anyone could help me with the code.

Such scripts are in the manual https://help.mikrotik.com/docs/display/ROS/Port+knocking

Hello friend!
In fact, I’ve already done the knock and it’s working. The idea was to use it to trigger a script in rb.