a couple of months ago I saw a pattern in a magazine for making an afghan out of different size and shapes of granny squares but wasnt able to buy the magazine at the time I was hoping someone else got it and was willing to share
From the top of the page when you enter this forum:
Important: Sharing photocopies of patterns or charts without the express consent of the publisher or designer is a copyright violation and is not allowed.
Just do a Google search and you'll come up with lots of free patterns.
Here is a link that might be useful: Google search for free granny square afghan patterns