Cool BO & CO

The video is in German and I have no clue what she’s saying but it’s easy to see what she’s doing. It’s joining two different colors with a third color.

http://www.youtube.com/watch?v=och5uug6eiU a two color version.

This one is a shell cast on. Also very cool. http://www.youtube.com/watch?v=ywow9a-gtEI