.......... ooooooo scary! I'll fix it sometime :)
This is another hairpin lace pattern, and is nothing more than the basic stitch. The difference here is that the loops are crocheted with increases and decreases in mind to create the gently zig zagging motif.
It's very easy to do by simply doing one single crochet in 3 loops a number of times in a row followed by doing ch 3 on either side of a group of three loops into which 3 single crochets are worked. Along the opposite edge, the increases and decreases are done the same way taking care to line up so that they compliment on the opposite side.