First, you get all your historical facts straight! Use the internet or library to look up what would have happened in your historical period -- what did people wear, how did they live, what did they do for entertainment -- even how did they talk! There are a lot of words we use today that wouldn't have been used in the past.
Then, just sit down and write your story, remembering the historical information you have learned. Here are some links to help with that part.
You could write a short story or read "War of the Worlds".
There once was...
Anyone who can write can write a short story! Short stories are defined as between 2,000 and 7,500 words long. Go for it!
There aren't any websites that will write your story for you, but here are some links that will help you learn how to write your own short story.
you tell what you are going to write about in short sentences.
I just read a great mystery short story.
The same way you write any story -- plant your butt in a chair and get started! Here are some good links to help you out.
a parable is a short story with a message
Go to talepost
hh
The brain.
write your homework for you. We WILL help you to do it for yourself. Check out the Related Questions at the bottom for help writing a story.