For creative people, sometimes the most daunting thing is the blank page. Sometimes you simply have no clue where to begin when working on a new idea; the idea can be so large that working from any particular perspective threatens to block out something else. Focusing on expressing one perspective could drive others out of your head, diminishing the work as a whole. Creative people usually come up with some solution for this. For me, I like to write down concepts and then organize them into a structure, usually an outline, that guides me as I work on other parts.
Sometimes that blank page can appear unconquerable. For less experienced people, it’s sometimes easier to borrow some structure from another source. In writing, a novice might borrow a universe they like and create “fanfic”. Or an experienced creator might want to take something they’ve seen and give it their own spin. An artist might take familiar characters from other media and create something new; conventions usually have art halls full of familiar comic characters in humorous or sexy situations they wouldn’t normally be found in.
So, let’s look at the use of other works as structure for your own.