Derivable fan fireworks. Blasts 3 different colors into the air and timed to go across from one side to the other. No trigger, just set it and let it go. Perfect for celebrating 4th of July, Independence Day, New Year's, or any party where you want some pyrotechnics. Easy to derive. Use images that are 16x512 for the colors. 3different parts to color for a nearly infinite color combination.