This technique was developed by Mary Ellen Hopkins in 1989 for her Hidden wells quilt. It can be done with a different number of strips in different or equal widths.
Here's a compilation with blocks made with 3, 4, 5 and 7 strips.
Blog post: https://mypatchwork.wordpress.com/2018/12/13/video-tutorial-hidden-wells-technique-two-blocks-with-3-4-5-and-7-strips
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