I think it’s something really easy, but I must confess my innate difficulty to write rules and code!
I’m writing an screenplay and would like to have an atribute, which I will call $Time, where I would have the moment in minutes when the scene happens. I’m have already an atribute called $Duration where I designate a number of minutes for each scene. To find the value of $Time I just have to add the value of $Time in the last item in the outline with the actual value of $Duration in the scene I’m working.
It’s simple but I must confess I don’t know where to start!