In the story, you could use 'generosity' perhaps in a sentence like "My neighbors showed extreme generosity to me because they gave me lots of candy" or something to that effect. 'Rebuke' means to show sharp disapproval at someone for their actions, so you can be like "I rebuked a little kid who was trick-or-treating because they were running around screaming at the top of their lungs" or something to that effect. 'Morose' means like gloomy or miserable. You can be like, "A kid was morose because he did not receive that much candy" or something. 'Dignitary' means a person considered to be important because of high rank. I'm not sure, actually, how you could use this in a story about Halloween. But for recycle, you can be like "We ended up recycling the bag that I used to trick or treat out of" or something to that effect, and for accessory you could say "A witch's hat is considered an accessory used for a witch costume" or something to that effect.
For the intro, you can start by introducing the fact that it was Halloween, and if you like Halloween or not, etc. to then set the stage for the details of your story. For the conclusion, you can be like "This Halloween was ____" and then explain your reasons why.
Hope this helps!
