The process of writing a common animation, such as changing colors, transforming, etc., is really easy.  You can start an animation when a specific event occurs.  To do this you can simply use a trigger which runs the animation when a specific RoutedEvent occurs.  XAML uses Storyboard elements to create an animation.  Each Storyboard consists of one of the different animation type elements.

One of the most important aspects of animations is timing.  It means developers should calculate the time that an animation moves from one state to another and the entire time that an animation takes.  This is not an easy task to accomplish in the current graphic user interfaces.  However, Windows Presentation Foundation solves this and makes it easy for developers so you should not worry about it at all.