The dollar stores has these flameless LED candles for yep - you guessed it $1.00. They have them in white and cream and they're wonderful for altering. (My advice, double check them before you buy them that the batteries are still good).
I used alcohol inks for this one - sunshine yellow, orange and red currant. Start with your lightest color, a craft mat (the non stick kind) or some palette paper (found in the art supplies section). If you don't have palette paper - you might be able to use freezer paper shiny side up. Add several lines of yellow ink to the paper and roll your candle through, let it dry. Take the next color, add it direct to the candle, letting the ink run down the side. Let dry and take your third color (option) and repeat. If you want to mottle the look, you can use the alcohol solution and a blending tool and just dab it on.