We will now create a fireball. Starting from the outer edge of where you want it to be, slowly draw in an ever decreasing spiral until the fire builds up. You may need to tweak the size and pressure of the media to make it easier depending on how fast your machine is. The faster the machine, the lower the pressure can be, and the larger the size you can work with. Conversely, if you have a slower machine, try a smaller size and higher pressure. You dont want the pressure too high or you wont get nice edges on the fire.