This is an example of how any picture or card can be turned into a quilt pattern:
I got this card from someone years ago and loved the picture. I photocopied it, cut out all the shapes (like the black shapes on the cows, the white shapes, etc.) and enlarged each piece. I used those enlarged pieces for my patterns and put it all back together in fabric, like a puzzle. This is a wall hanging -- but, the same method can be used for a quilt.