In my videogame, I needed a way to show the player that the game was busy processing animations, and would not accept input. The method I decided on was to add a flame animation to part of the user interface. I based my technique on a mix of Rappanem's, Saint11's, and ke2uke's fire tutorials. I started with a simple animation of "bubbles" moving in the direction of the fire. Then I added a bunch of "flamelets" that moved up and around the bubbles, to provide most of the perimeter of the fire. Then I filled in some of the gaps, then shaded everything. Colors were mostly picked from Rappanem's tutorial.