Well then, allow me to help with the colour thing! Along with red, orange and yellow (standard fire-related colours), you could do white (as fire gets hotter, it burns lighter until it's white), blue (when you light a gas burner, the flame starts blue), and green (This one is less a normal thing and more a "I have my own logic" thing. See, I've seen my father put together scuppers for rooftops intended to help get water down a drain pipe. These are usually made of metal and need to be soldered together. Part of the process is brushing a soldering paste (or muriatic acid mixed with bits of galvanized steel to kill the acid's strength) where you'll be soldering the solder. The idea is this stuff helps the solder grab hold of the metal. Anyway, after you solder a part, you gotta clean the iron off and then heat it up again. When you put a flame to it in this state, the gas will burn off any remaining debris from the paste with the flame turning green from the burn-offs. But legit, green flames are just a thing).
You now have six colours. Ensure that red, yellow and orange are never beside one of each other and it'll work great!
