It's my own pattern (I decided to just go for it and see how it worked out).
Ch to the length required and then sc into 2nd chain from hookRow 1: **dc into next chain, then sc into the next chain; repeat from ** until the end of the row, ch 1 and turn
Row 2: sc into next stitch then follow Row 1
Repeat Row 2 for subsequent rows until desired blanket size.
Finally sc evenly around the blanket, twice.
(This youtube video is great at explaining where to place your stitches, especially on the sides of the blanket - ideal for the less experienced like myself)