 Recapitulations, where themes are normally restated after they are combined and contrasted in development, are foreshortened, while codas, where pieces of music generally wind to a close, are greatly enlarged to a size and scope that can affect the listener's concept of the themes.Themes shuffle into new and unexpected patterns of order, and three- or four-movement structures roll into one in a continual process of creative experimentation.Part of this creative experimentation was a trial-and-error approach.