Just think about the HASH option on the FTP client console. Remember
this '#' character growing for every packet received.
Same stuff with the command WGET that shows you a graph of the current speed.
Years ago we were able to do such stuff on text consoles using again ANSI escape sequences !!
Have a look here for those ANSI sequences
So I have the dream that we can also do this within LOG4J messages ... wait'n see ...
I will have to test this. Then stay tuned and you will see a piece of Java code soon.