This is the design idea for my final project in my tapestry weaving course. It was done with a japanese paint brush. The big question was whether to weave this vertically or horizontally but in the end I decided to do it vertically because of the orientation of the lower marks.
And this is the finished tapestry. I achieved the vertical red line by wrapping the yarn around the warp between passes. It's woven in linen and wool on cotton warp. The background is mainly white but the photo doesn't really show it well.