Create Default for Dependent Drop Down List

Hi,
I'm using dependent drop-down lists. In the first box the user can choose a color which drives a set of options in the second box. (e.g. User selects "Red" and in the second dropdown they can then choose "Red A", "Red B", "Red C", etc.). Right now, if you select "Orange", it will still show "Red A" from the previous selection until the user selects the dropdown in the dependent box to refresh the list of options. Is there a way to make it so that second dropdown box will default to "Orange A"?

I tried writing some code to do this, but I can't seem to make it work. I've attached my file.

Thanks!!!!