Is it able to have data come out of it though, or is it fully... "sandboxed"? I am guessing the only output is the visual feedback you get when it's rendered?

Is it able to have data come out of it though, or is it fully... "sandboxed"? I am guessing the only output is the visual feedback you get when it's rendered? Oh... I guess if you can somehow have it trigger a "load an image with this query string" or something that could be a way to communicate with the rest of the world