new to multiplexing

Using Arduino LEDs and Multiplexing
#1

I would like to control 25 RGB LEDs from an Ardunio.

I am not really sure where to start. I have been looking for tutorials but I am really not sure what to do and how to learn.

Could someone point me to a good solid tutorial that is easy to follow?

#2

http://arduino.cc/playground/Main/InterfacingWithHardware#LED

#3