prayer flags are of square or rectangular shape, and are connected along their top edges to a long string or thread. They are commonly hung on a diagonal line from high to low between two objects (e.g., a rock and the top of a pole) in high places such as the tops of temples, monasteries, stupas, and mountain passes.prayer flags come in sets of five, one in each of five colors. The five colors represent the elements blue, white, red, green, and then yellow.Different elements are associated with different colors for specific traditions, purposes and sadhana. Blue symbolizes sky/space, white symbolizes air/wind, red symbolizes fire, green symbolizes water, and yellow symbolizes earth