Circlepuff Square crochet pattern - US terms
Round 2: join next colour between 2 tr. Ch 2, make puff stitch in same sp (*yarn over, insert hook* 4 times - 5 loops on hook. Yarn over and pull yarn through all 5 loops - puff stitch made.) Ch 2, puff stitch between next 2 tr. Continue around - 16 puff stitches.
Round 3: join next colour in a ch 2 space. Ch 2 and make 16 puff stitches as in round 2 - but yarn over 5 times for each stitch, and ch 3 between puffs.
Round 4: join next colour in a ch 2 space. Ch 4, 2 tr in same sp. 3 dc in next sp. 3 hdc in next sp. 3 dc in next sp. 3 tr, ch 2, 3 tr n next sp (corner made). Continue around, finishing with 3 tr, ch 2 in same sp you started in.
Tips for puff stitch: pull your hook up a little each time you yarn over to keep the yarn fairly loose, so it is easier to pull through on the last yarn over. Try not to wiggle the hook too much as you pull through so it doesn't catch the loops.
When sewing in the ends, give a good tug on the end from the beginning of the round as this makes the ch2 at the start as small as possible.