Thank you for the answers.
I’ve been fiddling with the shutters at home for a while now.
Now I’ve gotten it right so far by starting different flows.
Only now that I’ve made the switch to advance flows I want to add some extra things and see if it can be easier and clearer.
And that’s where I get stuck. I will add the link of my post.
to create more clarity.
Do you have examples of how I can best build/make my idea?
(sorry my english is not so good. but google translate helps me well.) 
