clamtk | demand virus scanner for Linux systems | Continuous Deployment library

this is my first time dabbling in bash scripting and first time using this site. I'm working on script that's meant to provide the user with a list of software packages to install and then output their choices into a 2nd script file that can be run later to actually install their choices. So far my script is semi working, but I need help figuring out how to; A) Loop the script so once they've chosen a package it restarts and allows them to select another instead of ending the script B) When they select "No" or "nN" to the confirmation it takes them back to choice list instead of wigging out and if they input anything other than yes/no it prompts for valid input

Here is my current script, I understand it's probably formatted horribly and most likely inefficient but it's my first time and only for a small school project I'm working on. Any help would be appreciated, thanks!