A fire-like pattern, just to show the artistic possibilities with "psrdnoise". This is a sum of five noise terms with the analytical gradient thrown into the mix, and with a color map applied to the result.
Without the color map and the animation, this looks rather a lot like a pile of wool. The likeness to wool is actually a lot stronger than the likness to fire. Fire is very hard to do well, We're researchers, not artists, and this is a quick demo, not a serious attempt at creating a fire shader. We just wanted to show a visually interesting use of the function, and add some color. There are lots of creative uses of "flow noise" yet to be explored by people with far more artistic talent than what we can muster.