multiple files

What is the easiest way to have multiple .cobra files that "know" about each other? I can get a cobra dll to be imported into cobra (to use python terminology) but the "use" syntax seems to not even look for .cobra files.
Discussion about the Cobra programming language.
http://cobra-language.com/forums/
cobra MyProgram.cobra Shape.cobra Circle.cobra Square.cobra
cobra -files-to-compile:MyFileList.text
cobra MyProgram.cobra Shape.cobra Circle.cobra Square.cobra
MyProgram