Next time, you'll know not to type that much code before you start syntax checking it (via perl -cw).

One way to work your way through that body of code is to use POD directives to comment chunks out. Pick a reasonable chunk at the top of the file and add   =for COMPILING below it. Then add   =cut to the bottom of the file. You've commented out everything between these directives. Now perl -cw the file, fix any errors that are reported, and then move the =for COMPILING line down a chunk. Repeat until you've reached the bottom of the file.