Where to start with multiplexing? or bit addressing?

Using Arduino LEDs and Multiplexing
9

Please explain what you mean by "animated LED strip"

This kind of thing?
![](http://i.ebayimg.com/00/s/MzYwWDM2MA==/$(KGrHqJ,!iQE5fbSLsPfBO,QEZQJH!~~60_1.JPG)

Or this kind of thing?