Re^4: Writing Modules

[perl.j]

in reply to Re^3: Writing Modules
in thread Writing Modules

I turned on strict and warnings. It is saying (in my test program)

Global symbol "$thing" requires explicit package name at C:\myperl\Per
+lJunk\mo.p
l line 3.

. I know what that means but I already said our $thing in my "module". I am really confused...