Once you’ve got your idea, you can think about how to turn it into a film. There are lots of different ways of doing this. A mindmap, where you write down all the ideas that might help, can be a good place to start.You could write a treatment. This is a detailed description of the story and how it will look and sound on film. Here’s an example: James Cameron’s original treatment for Terminator.If your film has actors and dialogue, you should write a script. There’s a standard script format.