We all use other quilts for inspiration, and you shouldn't feel guilty. Think of it as a compliment to the original designer. My avatar received its color inspiration from a quilt I saw online that had a totally different pattern. I decided on the checkerboard border because I saw one on a beautiful appliqued quilt done in autumn colors. I decided on the stars when I saw a lovely christmas table runner. As long as you aren't making an exact copy, selling it and claiming it as your own, you are just fine.