Segment 0

This segment encompasses all the LEDs (0-157). I used a glitter effect with a custom color gradient of red sparks with a yellow background. Set the colors just beneath the color wheel and then select the "color gradient" palette. I set the blend mode to Lighten. This creates a washed out yellow and red glitter effect on the entire strip. It comes across like flickering sparks on across the whole fireplace. I left the brightness at 100%.

Back Segment

The next segment uses leds 0-50, which are the LEDs in my back-most strip. I used the Fire color palette and the Fire 2012 effect, and set the effects sliders for a slower flame effect. I also clicked the "mirror" box - this make the flame appear to burn from both sides instead of starting on one side and burning toward the other. 

I used the "Add" blend mode so the sparks from Segment 0 come through more intensely on this layer, and kept the brightness all the way up since this needs to show through all the other layers.

Middle Segment

For LEDs 51-101 (my middle strip) I used the Glitter effect again, and set the palette to show red glitter with a blue background. I moved the effects sliders down to a very slow setting. This makes a deep blue, slow-moving area in the center of the fire that slowly creeps back and forth like a very hot flame, with occasional slow red ember-like sparkles. 

I turned the brightness down to about 50% on this layer.

Front Segment

For the front LEDs (102-157), I used the Fire palette and Fire 2012 effect again, but with slightly different speed and intensity slider settings, and I checked the Mirror box again. This is similar enough to the back strip's effect that it gives some cohesiveness to the animation while adding pseudo-randomness due to the different speeds of the two effects. 

I turned the brightness down to about 15% in order to let the back layers shine through a little more.