Is it possible to add an option to the chart after it is drawn?

I know I can delete an option with `delete option.optionname` but how can I add a new one?

Edit: @WhiteHat answer `options.backgroundColor = 'cyan';` works quite well but how can i add an animation like:

```
  animation: {
            duration: 4000,
            startup: true,
            easing: 'inAndOut',
        }

```

to an existing option.