Aileen, I have made a few quilts after looking at pictures in magazines for inspiration. What I find happens is that I use the idea as inspiration, then 'make it my own'. In the end it doesn't look anything like the picture that inspired it.
My guess is that if you hunted long enough on the internet, you would find a very similar quilt with directions you can download, sometimes for free!
I agree with the others - as long as you don't plan to sell it to anyone, use it.