After you've conducted your research, you need to plan your production.
For audio visual media texts, a script or storyboard is an essential part of this process.
Scripts are written in a specific format which varies from genre to genre; the format for a situation comedy is different from a television drama.
The BBC Writer's Room is a useful resource where you can compare the different script formats and get some inspiration.
When writing a script you should:
Consider the narrative conventions of your chosen genre and the narrative structure you want to use, for example, your script could be linear or non-linear.
Write believable characters the audience will empathise with. The situations the characters find themselves in don’t have to be believable but the characters do. For example, Doctor Who is science-fiction but the character of the Doctor has recognisable qualities we understand even if he is time-travelling.
Write more than one draft of your script, you won’t get it right first time so write and rewrite.
Ask someone else to read it and give you feedback.
You won't get your script right first time, you will have to write and re-write.