The scarf is knitted with garter stitch using squares from patchwork technique.
The knitting starts from three squares. Then a rectangle is knitted, which is elongated during the work (the cast-on stitches for the rectangle are made from the cast-on stitches of the squares + one stitch from the middle of the middle square). Next, without closing the stitches, we knit two more squares, from them a rectangle, and so on. We finish the knitting with three squares.
I crocheted around the scarf, slightly stretching the edge to achieve a slight wave.