This is what you could call the literary form of doodling. I started out with a simple description of a sunrise a while ago and recently found what I had written and decided to add some more details. As I went, the whole piece slowly morphed until it became a scene about Dante, one of the characters from my novel. I have a vague idea where this fits in relation to the events in The Clocksmith, but we’ll just have to wait and see if this ever gets used for anything.
On a separate note, is there a proper term for “literary doodling”? If so, I’d love to know it!