Well, if you are playing with CGI, you should be outputting HTML tags such as <p></p> or <br />.

The \n that you're outputting is putting newlines in your HTML document, but that doesn't affect how the document is rendered in a browser. If you want a newline to be rendered in the browser, the HTML that your script is outputting needs a tag that would be rendered as a newline. <br /> is one option, or using proper paragraph tags.