Called "Wishing Candles" make a wish and burn one knob each day for seven days.  Write your wish on parchment paper and place beneath the candle.  Before lighting the candle each time, recite this chant seven times: Candle, Candle, burning bright, Bless this wish with your light.
Black - Stop bothersome people
Green - Obtain a Job, success and luck
Red - Bring love and help with relationships
White - Peace in the home or business