Here's my basic scarf design. I start from the middle as shown by doing the magic cast on, onto 40 inch circular needles. In this case I am using a sport weight yarn, 64 stitches, on 9 sized needles. I did a few rows straight up knit and am now reducing by one stitch every other row. When I am down to 20 or so stitches I will probably decrease one stitch every row until there's 5 left and then I'll end it. I will complete one half this way and turn it around to complete the other.
For this project I spun up 2 skeins that more or less have the same color progression. I doctored the photo as the colors looked off to me. They are still off but whatever.