There are at least two applications built in as standard xscreensaver modules that do some of this already - they're actual terminal emulators in their own right. One is phosphor and the other is apple2. On my machine I can, for instance:
There are at least two applications built in as standard xscreensaver modules that do some of this already - they're actual terminal emulators in their own right. One is phosphor and the other is apple2. On my machine I can, for instance: