UPDATE 1: I HAVE ADDED THE CODE FOR CONWAY'S GAME OF LIFE
UPDATE 2: NOW YOU CAN SAVE SOME ARDUINO PINS WITH THE HELP OF 1 SHIFT REGISTER.
In this instructable I will show you how to build a quite fancy 8 by 10 L.E.D matrix(with scrolling text and animations) using the Arduino and 4017 decade counter. This type of matrix is easy to make and program and it is a good way learn how to multiplex.
I have added another part to this instructable about using the 74HC595 shift register which will help to save some arduino pins for other thing you would like to do.
So now you have to ways to go from here. You can make this matrix without the shift register and that will save you some soldering work or use the shift register if you want to have more free pins to use.