Rainbow Armor in One Command [Minecraft 1.8]

Hi everyone!
This command adds rainbow armor to your world. It is actually self-explainatory, but it is basically color-shifting armor everyone can equip. It's amazing, it's shiney, it's just amazing.
And the best is; you can install this with only one command.
If the sign doesn't work, then you can also just use this command:
/scoreboard players set @p rb 1
Or to turn it off:
/scoreboard players set @p rb 0

Watch it on YouTube: www.youtube.com/watch?v=m_NBAhdX13c
Install the command: bit.ly/RainbowArmorOOC