You can make the sequence as long as you think it will take. Then set the servo positions at different time intervals. On the tucano, I have a total of 6.0 seconds. The gear retracts instantly. Valve (whls) goes from 100 to -100 then 6 seconds later, the doors go. I have it setup to only last 3 seconds the opposite direction. There is a YouTube video: http://youtu.be/YQphSWqKRtU that should help you visualize it.