I want to set IDE background per git branch

Hello, I'm new IntelliJ world and Git.

I feel confuse which branch I am.

It just little text in bottom status bar.

Yesterday I unconsciously "commit and push" to master branch.

It was terrible experience to me.

So I want to change background image when I checkout branches.

My plain is when I checkout master branch, background image will change to something.

Can you give me any idea or guide?