Depending on what you are talking about, the content is what is being said or used. such as in an essay, the words is the content. or if it's like a picture, it who or what is in the picture.
It is called Musique Concrete. (The first e in concrete is accented.)
I feel like they would do something different to stand out since symmetrical balance can be overused.
Hope this helps!
Why don't you do a crowd or empty seats or a theater it really up to you but you can do one of the suggestions
