In the last article, using older computers that does not use the fancy graphics of today. You actually can do quite a bit with text such as movies, radar screens and etc. though the old favorite of using a computer as a clock. Source for the program is aclock.c (http://www.tenox.net/out/)
Another generic clock: vtcclock (http://webonastick.com/vtclock/)
Many command line users really appreciate text graphics to make their terminals more interesting especially at the point of login.
Want to see more? More at: http://www.instructables.com/id/Graphics-in-a-text-world/