I need help!

I am working on my 9 patch quilt along with AmandaJean. I have only 7 done and by Sunday I should have 21 done. Last weekend I bought a charm pack because I was not happy with some of the scraps I had. I do have fat quarters that I like.I want to turn it into a double size quilt for my daughter so I wanted some new fabrics that would suit her and I like the idea of added variety. I love the charm pack idea. The only problem I realized is that I can only get 4 squares out of each one, so I can't do a complete 9 patch with them. Yesterday I read Red Pepper Quilts blog and I love what she is doing. She is making the 9 patch completely scrappy and having a white centre as the middle. I really like it and it would solve my problem of the charm pack. So here is where I need help. Is it copying if I do something similar to hers? I would still use only 2 fabrics in each square but have white as the centre. I have done 2 quilts that have used the similar floating technique and I really like both of them. I would use my 7 squares to make a doll quilt. Please let me know what you think.