Video: Winter is coming, and what goes perfect with dropping temperatures? That's right, fire. This rainbow pyrotechnics show was put together with materials you can probably find at the hardware store. Surprisingly, making blue, green or red coloured flames doesn't require a PhD in chemistry -- just tinted tiki lamp fuel or colour flame dye. Add in a generic spray bottle, an open flame and you're all set for some pretty, toasty-warm fire. The high-speed camera is optional, but certainly results in some memorable footage.