1. A software program for creating features for use with a plurality of media objects in a sequence, said program comprising: a feature component specifying a feature having parameters which affect at least one variable aspect of the feature; an indicator component for identifying a position of the specified feature relative to the media objects in the sequence; a sequence generator for modifying the specified feature by varying its parameters as a function of the position of the specified feature within the sequence; and a rendering component for rendering the specified feature according to the varied parameters of the specified feature at the identified position when the media objects are sequentially displayed.