KKB Demo (actually called KKB First Demo) is a Demo made by Tom and Chilly of KKB and was released in march 1990.
The first part is an overscan mode 2 screen with text on it which uses colour splits to increase the number of colours.
The second (and last part) features an overscan screen with multiple splits showcasting hardware scrolling, animated split rasters, a hand-writing writer, tubular rasters and a big hi-res logo scroller on a very colorful screen.
The demo can be seen here: http://www.youtube.com/watch?v=YFRnnk-2vwo