Can anyone tell me, how to make a focus, that gives another country an event that asks them to agree with the effects?

Depending on the type of event you either use news_event or country_event. But aside from that one line changing, everything else is the same.

For example, if you wanted to give an event to the UK:

ENG = {

country_event = {

id = EVENT.ID

days = 1

}

}

This will trigger an event the next day.