So your theme has blossomed.You must now open your eyes,ears,and sensory perception,and get information.Watch out for events,people,and words that come your way everyday.Through sources like newspapers,magazines,books,radio,TV,Satelite Cable Network,and Internet to mention but a few,you will find characters that are of tremendous benefit to you as a screen writer;it only requires creativity and concentration.
A screen writer does himself a favour when he acquires information on the theme of his screenplay.To every infinitesimal,ordinary thing,you must begin to read relevant extraordinary thematic interpretations.Your opinion,as conditioned by the theme of your screenplay,concerning the information that comes your way,matters.You must put pen to paper.
As you write, sub-themes will prop-up so, be careful not to veer-off,overflogging them.Sub-themes are important to the extent that they help the writer to highlight the theme otherwise,they are distractions.Reading novels and other forms of crative writing and paying particular attention to the treatment of themes,are useful in understanding how to handle sub-themes in the framework of the theme