Prayer flags are traditionally hung indoors and outdoors on trees, homes, or mountain tops so that when the wind blows their energy and prayers are released into the universe to spread the goodwill, Love, Peace, and compassion. Traditionally, Tibetan prayer flags come in sets of five, one in each of five colors. The five colors represent the elements. Blue (symbolizing sky/space) White (symbolizing air/wind) Red (symbolizing fire) Green (symbolizing water)