Create a very simple demo/tutorial application that shows two cars driving on circles around kiev. The source should be similar to our other tutorial applications:

http://techbase.kde.org/Projects/Marble/Runners/DisplayGeoDataPlacemark

The new application should have the following features:

• both moving objects should be represented as placemarks
• the positions (just the positions!!!) should be calculated inside a dedicated worker-thread
• the objects should be created as GeoDataPlacemarks and be fed to the Marble tree model (see http://techbase.kde.org/Projects/Marble/Runners/DisplayGeoDataPlacemark)
• the radius of the two circles should differ (one of them twice the radius of the other)

The aim of this task is to create the shortest and at the same time most elegant solution. The solution should fit into a single file so that it can be easily fully quoted on a tutorial page.

This task does not include the creation of the tutorial text yet which will be part of a future task.