Traditional prayer flags are rectangular cloth squares comprised of five different colors (blue, white, red, green and yellow). They are often found along ridges and peaks (windy areas) high in the Himalayas and believed to have originated with Bhuddism, although some theories suggest they originated earlier.
Hanging prayer flags in elevated and windy places, will allow Mother Nature to slowly break down the flag, and carry the blessings of peace, compassion, strength and wisdom into the wind.
While traveling through Bhutan, my wife and I saw prayer flags everywhere. At one point in our travels, we made our way high atop the town of Paro, and could only see prayer flags seemingly as far as the eye could see. As the wind whipped across the mountain town, the constant sound of the flags flapping in the wind was as therapeutic as it was amusing.