How do you add multiple repeats than just 2 repeats as normal?

Ok. This is getting very confusing about adding more repeats instead of the exact 2 repeats in a score. I don't know how to add more repeats in each bar line.

Here's an example score of Johann Sebastian Bach's 14 Canons, that someone created by using more than 2 repeats in each bar line: https://musescore.com/user/44564/scores/1085451#comment-3224151

I don't know how the creator used these extra repeats in these bar lines. If you have any answers or results about this question, Please feel-free to comment below.

Thanks.