How to use timestamp and calculate how long the player was out

Simple feature you may say, for i woulf disagree with you. This time tracking calculation is hard for me and i can’t get round my head every way, every position i always end up same place there’s no way to do what im going for or even get half ways to what im trying to get to. So please help out

How does one use this extension, and dont give that example project cause it make no sense at all and you keep suggesting it yet have you used it?

I don’t need to count time when game is closed
So i did not care to investigate it to the bone
However i did open it and check what is there (i am talking about example)
One event was constantly spamming save
Where only one of 1st or last events (or last i don’t remember) was responsible for loading saved time from save and comparing it against current time

Rest of events were purely for this game so they were not important

So if you look into that project look what is what and strip it of parts that are purely for game
You will be left with very few events to work with