LanX's suggestion will work well for what you need. If you ever do anything more complex where you need to find files in a jumble of directories and subdirectories (and do something with them), take a look at File::Find.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James