J-man - I have been using a new App. It is called Spawn illuminati and it costs $0.99. I advise spending the extra dollar instead of buying the lite version. It is a time waster that lets you control colorful little lines that leave tails. You can control the environment, the properties of the lines. you can take snapshots, and adjust all the settings. You can set how you want the lines to interact with your finger, such as making them stay away from, or follow or swirl around your finger or jump back and forth between two fingers. You can pinch or spread your fingers to make the gravity stronger or the tails shorter. You can change the color or speed and is very entertaining to watch.