Rainbows!

function rainbow(args)
        local str = ""
        local colours = { "|cFF0000", "|cFF6600", "|cFFEE00", "|c00FF00", "|c0099FF", "|c4400FF", "|c9900FF" }
        local pass = math.random(7)

        for char in args:gmatch"." do
                    if char == " " then
                    str = str .. char
                    else
                        str = str .. colours[pass] .. char
                    if pass == #colours then pass = 1 end
                    pass = pass + 1
                    end
        end

        return hecho(str)
end