Creative approach that beats the tar out of other entries. I love the extended metaphor of a story being a rose. Great way to remember the ingredients that go into a story with the alphabet letters. Especially great that you gave an example. Sorry to be out of sixes, but I did vote for you.
I enjoyed the message in your essay. I particularly liked the way you combined your personal experience with writing and the instructional section with the letters ABDCE. You wrote a lovely closing paragraph too, especially the last line. It reminded me of confetti.
Never heard or saw it put into words like this. Pretty simple formula. I guess my only question is if the protagonist or antagonist always have to change or learn something by the end of the story. Real life suggests that doesn't always happen, or we wouldn't have numbers after some of our wars. Keep writing.
I like how you share the rules of story writing you learned in your writing course. You explain the ABDCE method clearly. Using a personal anecdote to illustrate wasa good idea. I am not sure the rose metaphor is necessary to open your essay. I would begin with paragraph two. Also, you should clarify that these story-telling rules apply to both fiction and non-fiction.