|I use two skeins of complimentary colors for one blanket.|
If you want a pattern that's incredibly easy, you'll find one below. I found it on the internet, and adapted it a little bit. My blankets take two 7 oz. Red Heart Super Saver skeins of yarn, and I use a J-size crochet hook. The dimensions are approx. 30" x 35".
Create a slip knot with your yarn.
Start your foundation with a chain stitch by chaining (Ch) 100.
Row 1: Single chain (sc) in each chain to end. Turn.
Rows 2 to end: Sc in next stitch (st), and in each st across. Ch 1. Turn. Repeat until your two skeins are used up. Fasten off.
This pattern produces a tight weave which works well for children in hospitals since cords don't get caught in it.