Thank you for the pattern picture. It’s kinda like a version of a shadow block. I haven’t seen this version, so thank you. What language is this written? Be sure and show us your finished quilt. I will save it in my Modern files. Also, I think it would be ok to sew the regular 1/4 inch seam or any seam allowance you usually sew, just so you were consistent throughout.
It is a pattern from Finland. It is from an association . They give away several patterns for free. https://finnquilt.fi/ohjeet/
Think that you can translate with google chrome if you need