i want create my animation by Visualization.
but i don't konw how to use custom css
and show its effect in Preview windows
If you want to style objects outside of the properties available in the Animate application, you can do so by using the following syntax:
"background-color" : "red",
"width" : "200px"
However, this will only preview in the browser and not on stage since code doesn't execute at authoring time. You'd get yourself in a pretty bad place if this happened since events would fire when you're trying to edit
If you have a stylesheet you've linked to your project, you can also add a class to objects which will reflect the CSS when you preview in browser.