import random

def makeRainbow(word):

    word = word or "RAINBOW"
    output = ""
    rb = ["5","7","8","3","12","13","6"]
    bg = "01"
    idx = random.randrange(0, len(rb))

    for l in word:
        if l == " ":
            output += ' '
        else:
            output += "\x03" + rb[idx % len(rb)] + "," + bg + l
            idx += 1

    return output