Draw a picture of yourself with the negative thoughts affecting you (could be a black cloud, or your own interpretation of how they are affecting you). Charge a red candle with healing energy, light it, and hold the tip of the picture in the flame. After it's lit, drop it into the cauldron or heat-proof dish. Now, with the red candle still burning, draw another picture of yourself without the negativity. Place this under the red candle and let the candle burn out. You are done.