The turned corner effect on the squares is cleverly created by knitting 2tog twice in the middle of every second row. I began (as Liz instructed) by casting on 72 sts.
First row: K34, k2tog twice, K34
Every second row: Knit
Third Row:K33, K2 tog twice, K33.....and so on.
I'll keep at this inbetween other knits and maybe Patch will get himself a blanket!
HAPPY INDEPENDENCE DAY..to Stateside readers