I'm trying to write a story but I'm trying to have multiple different endings to it. Any advice of how to do that?
The simplest way is to have 1 or more choices face the main characters, and their answer to said questions lead them down the path of a multiple ending scenario, and it terms of writing that would come down to a choose your own adventure book sort of scenario "turn to page 10 if yes, or page 14 if no" sort of thing.
Do three endings. One is red. The other blue. And third is green. Everything else is unchanged. Spoiler