My masterpiece, which is for the moment on the backburner, is a space opera trilogy. The ideas in the story are huge and the story itself is immensely complicated and intricate. But the story itself has very humble beginnings.
When I was in sixth or seventh grade my english class was given a writing assignment: write a story. No other guidelines than that. I was of course a sci-fi freak, and I think I had recently seen Independence Day. So I wrote a little story about bad alien dudes who took over Earth, and then got kicked off by a human underground.
A year later I had to do another writing assignment. I decided, hey, a sequel would be cool. So a now technologically advanced humanity enters a galactic community, colonizes a world, finds it populated by the same bad aliens, and then destroys the world with amazing technology. Later that year a third assignment was given to me, a second sequel was written. A few of the aliens, in a last ditch attempt to get revenge on Earth, fly over to Earth and launch an attack. The humans, allied with these strange bird people, defeat the aliens again, kill their king, and repel the attack.
The story was childish, without any characterization, and with many, many plotholes.
So naturally, a few years later, I decided that it must be made to look a little better. The same basic plot was retained but with a much greater focus on the galactic community and with mcuh greater skill being applied to the piece. I gave up pretty quickly, because at the time I was terribly depressed and only writing so that I didn't do something bad.
A year later though, which would be about a year ago, my skill once more much improved, I began again. This time, however, I considered one of the species I created in the original sequel, these powerful telepaths that gave psychic ftl to the humans. I focused on them, their origins, their motives, and the story began to develop well past the original.
Then, in an attempt to maintain the plotline, I developed this huge backstory that made everything work. I realized this was sort of contrived, and began to mold the story so that it was a tad more realistic. But the huge backstory stayed, and continued to grow, and began to shape new elements in the story.
Eventually I had a huge project before me that was three novels. The first one a much expanded version of the first story, the second one encompassing the second and third stories, and the third novel creating a grand conclusion that explained the origin of everything, even the universe itself.
All of this because I watched Independence Day in a large theatre and was given an open writing assignment in English six years ago.