Animated Canvas as a background image of a website

Animated Canvas as a background image of a website

Hi,
Since I sligthly improve my knowledge in canvas I was wondering if it is possible to define a background canvas in my <body> like we can do with back-ground image.

The idea is to have an animated canvas that would run.

Of course I prefer to test my ideas before begining to try to code.

So firstly my question is does some one knows if it is possible and would have an example of coding,please.

Great thanks.
David

David  ( @webtecgeek   www.thecacaocafe.com )