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Without further ado, here's the pattern:
Cast on a multiple of three stitches, plus two for the edges. I used 47 stitches, which is giving me a scarf about 8" wide with my chosen yarn and needles. Your results will, of course, vary. If this matters to you, knit a swatch.
Row 1: K1, *P1, K2tog, yo*, end K1
Row 2: *K1, P2*, end K2
Knit until you're sick of it, or the scarf is long enough, whichever comes first. Cast off. Block it if you want to.
That's it. Really couldn't be easier, right?
The pattern as written creates a scarf that is entirely lace, with a single-stitch garter border. If you want more of an edge, cast on a few more stitches and work those in garter stitch. If you want a shawl, cast on more stitches; just make sure you use a multiple of three for the lace section. I think this would make a great shawl or throw in worsted, or even bulky weight, yarn.
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The pattern looks great from both sides, which I think is important in a scarf.
So...anyone feel like knitting along? I only have about eight inches done, so you have plenty of time to join me!