This is an example of a random prompt game. The idea of the exercise is that you start with green flag, add some blocks, but include at least on broadcast. Then, either in that sprite, or another, you receive that broadcast, so whatever, but have to include at least one more broadcast, and so on. The idea is to try to come up with something interesting that is based on a series of connected broadcasts. The basic constraint is that there must be at least one execution path that goes to all the broadcasts, possibly in order.
