Shell Programming and Scripting

Hi all,
I know this is a simple script for most of you. but it has me baffled. I'm new to this. I can figure out some of it but I get lost thinking about the what if's. Can someone please help me writing this script in UNIX.
1. Rename a file upon the users, request. If the file exists, prompt the user for confirmation before renaming the file. The screen should prompt the user for:
a. "Name of file you want to rename." Use the "\c" escape character.
b. "New name of file" Use the "\c" excape character.
c. "File Exist" to avoid overriding a file.
d. "File $oldname changed to $newname."
e. "Do you want to rename another file?" If the user selects "yes" the system should refres the screen.
f. Refresh the screen to go back to the menu until the user selects the exit option.
I go as far as.
echo "Name of file you want to rename: \c"
read oldname
echo "newname of file? \c"

Thank you for any help you can give.

This really looks like a school assignment - that sort of thing is against forum rules.

Hi Jim,
I'm not sure whether it's a school assignment or not it was given to me by a friend of mine. I have limited knowledge about UNIX & she has limited knowledge about Java. We traded off. I think she digged deep in her desk for this assignment. I gave her a fairly easy one. I tested part of the script and it worked, can't get any further than that. sorry if you felt like I breached the agreement. I'm still not sure wheter it's a school assignment or not. I'll ask her.
relly26