Ciao Silejonu,
I was playing with your code and I liked it a lot as a baseline to animate some scripts on waiting time (it's simple, clear and requires just basic bash dependencies).
I did some tricks to try the porting of VT100 animations found here: http://artscene.textfiles.com/asciiart/ using it as an example.
It's just a test but, try it out, and if you like it... I could try to finalize some vt100 example asking to some of artscene artists if is it possible to ue it.

Regards

P.