Prairie points are made by folding a square of fabric in half on diag. and in half again. The raw edges are sewn into the project. The finished effect, while looking complicated, is easy peasy. Get yourself that pattern, and you will see this is not difficult at all. Once you have the technique, you can adapt it to quilts or wearables.
If this pillow has no pattern, post a picture on this thread if you can. We can help you create a facimile through our combined forces. This forum has some very creative folks, who just love a challenge. Become a member and join us! This is a great place to learn and share your own experiences, thereby helping others learn. :D