This pattern is based on lyndamk's Lavender Fields Blanket (which you can only see if you have a Ravelry account). Her pattern is hdc, ch 1 but I couldn't get mine to turn out quite right. The "weaving" just didn't seem tight enough. So I made one little tweak.
I crocheted each hdc into the stitch 2 rows below. So the yellow row is being crocheted into the grey row, skipping the white row.
Here's the pattern written out (in US terms):
Chain the length that you would like your project to be.
Row 1: * hdc, ch1, sk 1* Repeat across. Ch 2. Turn.
Row 2: *sk 1, hdc into the stitch 2 rows below (the starting chain for this row)* Repeat across. Your hdc and ch 1 should be alternating now. Ch 2. Turn.
Row 3: *hdc, ch 1, sk 1* Repeat across. Ch 2. Turn.
Repeat row 2 and 3 until your project is the size that you would like.
I changed colors at the end of each row.
Let me know if I made any mistakes writing this out or if you have any questions.
making progress on my afghan - and using up lots of scraps of yarn!