This application is a bit of fun, but also a good example of some interesting functions in QlikView.
1. ValueLoop is a great way of creating a synthetic dimension in a chart. Here it is controlled through variables to give a dynamic range to the ValueLoop meaning the user can control how many values appear in the loop and what size step the loop takes.
2. BitAnd might be family to programmers but in the context of this application it allows us to dynamically control the transparency of a calculated colour.
3. ColorMapHue allows us to control the hue of a colour based upon a value between 0 and 1. This appears to mainly be useful in an artistic setting like this application, though any examples of real world use would be interesting to learn about.
This is all used to configure a highly customised scatter chart using lines to join the points. I think it makes quite a nice demonstration of these interesting capabilities.