Step function for reward value

Hi

I apologize if the solution is somewhere in the forum, I've search but couldn't find an answer. I'd like to increase goodmonkey's duration following a step function. Reward value would increase as my animal performs correct trials and would be reset to a baseline value if he makes a specific type of error. Optimally, it should reach a plateau (stop increasing once reward duration reaches a specific value).
Is there an easy way to code this in my timing file?
Thanks
Guilhem

I don't know what you are expecting, but you just said everything you need to do. Evaluate your animal's performance, determine the reward duration and put it in the goodmonkey function.