A Soul Has Two Edges: Plays On Homosexuality (Posteterne, Purple, A Tinted Edge) - 1. Established in 1990, Toy Factory Productions is a Singapore based artistic enterprise devoted to creating multi-disciplinary performing arts. This script collection consists of 4 books with a total of 13 original scripts written from 1992 to 2009. This is Book 1 and contains the plays: Posteterne; Purple: and A Tinted Edge.