I followed Mike's pattern using a single color for the granny square till I reached the blanket width I wanted, then I veered off on my own for the border.
I was really pleased at how it turned out and hope the mother-to-be likes it!
Row 2: Crochet this row using the half double crochet stitch; end row with slip stitch and Ch2.
Rows 3 and 4: Repeat row 2. When you are ending the 4th row, slip stitch and draw the yarn through and pull it closed. Weave in the tail with a yarn needle and secure the end.