A visual actualisation of mindfulness? :

http://uk.youtube.com/watch?v=gOedScy2VjI

Then:

http://uk.youtube.com/watch?v=i9RXuC182yk

That's very cool; kind of spell-binding.

Sometimes in meditation I see light and patterns fading in and out much the same, only in the deep purple, black and bright yellow range. No recognizable letters.