Nation Competition

Terry Pratchett's novel Nation has been adapted for the stage by Mark Ravenhill and will be performed at the National Theatre this winter.

The Guardian is running a competition for young scriptwriters, aspiring film-makers and theatre fanatics. To enter, you will have to adapt an extract from Nation, and produce a three-minute YouTube clip inspired by it.

The winning entries from each category - 10-14 and 15-17 - will have their short films re-shot and screened as part of the National Theatre's NT Live event on 30 January 2009, when the play will be broadcast live by satellite to more than 300 cinemas around the world.

Deadline: 12noon 13 November 2009

Find out more and apply at the Guardian website.