This was used for an early form of animation, but is not all that useful a tehnique anymore and is very inefficent. Client pull puts the decisions about document updating into the hands of the browser, which has more time to make these decisions. META is a component of the HEAD of your document and must go in the head tag. Here's our first example. Here's some text.
Content is the time in seconds.
This can be any amount, including 0. That means it must appear before any text or images that would be displayed as part of your document. A more common usage is to go to another page after a delay. This is used by many services to present an opening page then more pages later. Note that all of the URL is in quotation marks as part of the content option.