Ok, so you've installed Chasm now and want to get to work. What is Chasm about?
Chasm is about rapidly creating complicated interactions using new and reusable concepts. Each concept is a single idea. That is key to Chasm. One concept is one idea explained at a high level. The state machine representation in the concept can be used to show how that idea flows and progresses as events in the system occur. For any behavior you are trying to specify of interest, it will be too complicated to explain as a single concept. To abstract the complexities of the behavior, create new concepts which encompass a full idea of their own. When those created concepts enter states which are meaningful to the original higher level concept, notify the higher level concept with its own symbols. In this way, ideas are explained in their entirety in one place and abstracted details are placed into other concepts. Higher level concepts can be notified as events happen in lower level concepts using their own symbols so lower level concepts can't break the higher level concepts. Also, as more functionality is added to the system, the original ideas still remain distinct because of the explicit relations you have created between concepts.
There are several tutorials for Chasm as well as examples of usage in the Chasm examples directory.