This is my Oops bag because I started out making a hat, but made it too big, so just kept stitching until the skein was almost gone and finished with a row of 2dc 1ch to make holes for a ribbon to turn my failed hat into a drawstring bag.

I’m still experimenting with the two yarn spiral start, and thought it would be fun to go from both ends of a color block cake.

I chose to use a double crochet (dc) stitch because the counting is easier than a half double crochet.

The holes for the drawstring are a little off set, since I was working in a spiral, but it isn’t really noticeable when the bag is closed.
To summarize my process (American notation): In a magic circle, cast on 2 sc, 2 hdc, 1 dc with yarn 1. Cast on 2 sc, 2 hdc, 1 dc with yarn 2 (10 stitches total). Row 1: Yarn 1: inc in each Yarn 2 stitch, Yarn 2: inc in each Yarn 1 stitch (20 stitches total). Row 3: Yarn 1: (1 dc, inc) repeat 5 times Yarn 2: (1 dc, inc) repeat 5 times (30 stitches total). Row 4: Yarn 1: (2 dc, inc) repeat 5 times Yarn 2: (2 dc, inc) repeat 5 times (40 stitches total). Continue adding dc between increases until circle is desired diameter. Then dc round, alternating yarn 1 and yarn 2 (this is more obvious than it sounds when you get going!) until you get to the desired length. To make the eye holes for the ribbon, using yarn 1 (1 dc, 1 dc, chain one and skip dc) go 1/2 way around. Do the same with yarn 2. 1 hdc, 1 sc, then single crochet (sc) around half with yarn 1 and repeat the other half with yarn 2. Fasten off and weave in ends. Weave ribbon through the holes (two strands of ribbon starting on opposite sides makes a secure drawstring).