Here's a link to help you:
this pin will really helps https://www.pinterest.com/pin/52072939413638374/
I'm working on a crocheted rag rug for my little girls' bedroom makeover right now, but I don't have a blog post about it yet. Cut your fabric into 1" strips, and crochet it in a circle. The tricky part is getting the rug to lay flat. Good luck!