door/window stopper slightly over-engineered

was wondering how leave a small opening, after some attempts here is.

it's for stop the door or window about a couple of centimeters permit to fresh air goes inside on night time

it's only a performance of an idea long time i minded
every doors/windows have their specs, so it's a good start for develop someone be worth for you.

better print in PETG for a better elastic response to stress