The PROSECCO network (an EC-funded project for the PROmotion of the Scientific Exploration of Computational Creativity) is organizing a computational creativity code camp in Coimbra, Portugal (January 12-15, 2015). This presentation introduces the challenge that participants will address in groups: build a creative Twitterbot that can generate its own interesting micro-fiction using a large knowedge-base of facts about real historical people and fictional characters. Computational Creativity is the scientific study of the creative potential of machines: to determine whether machines can indeed be creative, it aims to build generative machines and programs that exhibit human-scale creativity.