Such a hard question to answer. It is not original if you copy in any way. But, we all recognize that not everyone ascribes to that philosophy. I never go to a quilt show that I do not see beautiful quilts that are said to be original that I know I have seen the elements used by others in their original quilts. Give credit where credit is due but be honest with yourself and others about it. I know I am not 'original' but I frequently use ideas that have obviously worked for others.