JESS: backward chaining

[Sander Rensen]

Hi all, Currently i`m working on a program to create stories. Each actor in the story is an agent with a jess-engine. The program works with turns. When an agent is on a turn, the agent has to decide wich action he wants to do. The action he has to do should bring his current goal one step closer. I know i must use backward chaining, but does anyone have an idea how i can run the engine just doing one step ?? Has anyone any examples for this problem Thanks in advance, Sander