This is a simple and beautiful flower pattern done in only 5 rounds. Not only does this contain the pattern for the flower, it also contains 5 different ways you can use the flower with picture descriptions;
Bookmark Penholder Shawl Brooch Jar Cover Wall Hanger
But wait, there is also a bonus in there created by Crochetedbytess to further develop the flower.
You can use any yarn, scrap yarn is perfect for this, and hook to match your yarn.