Shell Programming and Scripting

hi guys,

i'm totally new with Unix sripting and no idea how to do the scripting at all. My problem is that my boss asked me to do this:

1.) create a script that will tar or gzip the files in particular directory
eg:
i'm on my home directory and I need to tar/gzip the file in.. assuming the directory to gzip: /home/sample/temp

2.) condition is that: files to be zip are those files which is 7 days older and above.

Thanks alot for help...

Code:

find * -mtime +7 -exec zip filejmg {} \;

this will create a file called filejmg.zip