View source for Variable Aspect Ratios

https://en.wikipedia.org/wiki/Aspect_ratio_(image)
https://en.wikipedia.org/wiki/File:Filmaspectratios.svg
https://en.wikipedia.org/wiki/List_of_motion_picture_film_formats
https://en.wikipedia.org/wiki/List_of_common_resolutions#/media/File:Vector_Video_Standards.svg

https://www.reddit.com/r/imax/comments/rhkic3/various_aspect_ratios_on_169_178/

https://toolstud.io/photo/aspect.php

https://www.youtube.com/watch?v=d-z6LOGwOj4


https://i.rtings.com/images/black-bars-aspect-ratio-16-9-21-9-4-3-cinemawide.png

reference
that moment before the screening staerts in whicvh the cinema projector adjusts its standard aspect ratio to the film's and you see projected black bars seamlessly shifting on the black-because-non-projected-on screen


I want to make a video piece consisting only in these variations of aspect ratio. continuosly adjusting aspect ratios - one morphing into another

make that moment/event the content of the film