Programatically create more than 100 albums with names that follow a pattern

[rodrigo-morales-1]

Let me explain my use case: I'm enrolled in 7 courses in an institution. Each of those courses consist of 20 lectures. In each lecture, I take notes on paper and then I take a photo of my notes. I store the photos for each lecture in a separate album.

For example, here's the name of those albums.

geometry-lecture-01
geometry-lecture-02
geometry-lecture-03
...
geometry-lecture-20
algebra-lecture-01
algebra-lecture-02
algebra-lecture-03
...
algebra-lecture-20

I was wondering how I could create 140 folders without doing it manually.

I want to create those folders on a single day before the study period starts so that I don't have to create an album manually in separate days during the study period, when I'd rather avoid doing repetitive tasks and use my time and energy where it matters.

What I tried

Attempt 1: Failure

I mounted my SD card and I executed the script below. It created empty directories inside the Pictures folder. I opened Android settings and pressed "Clear data" for AvesLibre. I then started AvesLibre and I had to do the first-time setup, but I noticed that the albums were not created.

courses="geometry algebra chemistry physics biology astronomy trigonometry"
for course in $courses
do
    for lecture_number in $(seq -f "%02g" 1 20)
    do
        mkdir -p "/mnt/sde1/Pictures/$course-lecture-$lecture_number"
    done
done

From this attempt, I learned that having an empty directory in the folder Pictures is not enough for the album to be created inside Aves Libre.

Attempt 2: Success

I then downloaded a simple image from https://commons.wikimedia.org/wiki/File:White_background.png

wget -O ~/Downloads/sample-image-to-create-album-in-aves.png 'https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Solid_white.svg/250px-Solid_white.svg.png'

and created directories but I also copied the image to each directory

courses="geometry algebra chemistry physics biology astronomy trigonometry"
for course in $courses
do
    for lecture_number in $(seq -f "%02g" 1 20)
    do
        dir="/mnt/sde1/Pictures/$course-lecture-$lecture_number"
        mkdir -p "$dir"
        cp ~/Downloads/sample-image-to-create-album-in-aves.png "$dir"
    done
done

I then opened AvesLibre and the albums were created. See screenshot below.

While I feel satisfied with my results, I'm starting this discussion because I want to know how others would have done this or if there are quicker or more convenient ways to do this.