when i run this with the "use strict use warnings" i get this:

Global symbol "$path" requires explicit package name at punctuation.pl
+ line 6.
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...
what is an explicit package name? how do i delcare it?

Whenever perl gives you any warning or error message you are unsure of the meaning of, consult perldoc perldiag (or say use diagnostics;, which tries to do this for you).

In this case, it says:

(F) You've said "use strict vars", which indicates that all variables 
+must either be lexically scoped (using "my"), declared beforehand usi
+ng "our", or explicitly qualified to say which package the global var
+iable is in (using "::").
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which would at least have told you about "our", and explained the wording of the error message (which certainly isn't worded as helpfully as it could be).