A few days ago we made another widget. It's a clock which appear like a scope of an old radar. You can see the clock hands which are similar to signals of airplanes with simple jammers that block the range detection possibility.
You can vary the antenna velocity from one rpm (so the radar beam is moving like a second hand) to sixty (very-very fast). Default value is ten seconds per one revolution because it is close to the velocity of most of real radar antennas.