Main article: Rule of three (writing) The third event in a series of events becomes "the final trigger for something important to happen." This pattern appears in childhood stories, like Goldilocks and the Three Bears, Cinderella, and Little Red Riding Hood. In adult stories, the Rule of Three conveys the gradual resolution of a process that leads to transformation. This transformation can be downwards as well as upwards. Booker asserts that the Rule of Three is expressed in four ways[citation needed]: The simple, or cumulative three, for example, Cinderella's three visits to the ball. The ascending three, where each event is of more significance than the preceding, for example, the hero must win first bronze, then silver, then gold objects. The contrasting three, where only the third has positive value, for example, The Three Little Pigs, two of whose houses are blown down by the Big Bad Wolf. The final or dialectical form of three, where, as with Goldilocks and her bowls of porridge, the first is wrong in one way, the second in an opposite way, and the third is "just right".[3]