Toggling Battery Level Percentage Text

I am trying to toggle the battery percentage text to appear and disappear when tapping on the battery icon. My battery icon is a .png picture not a built-in shape on Facer. I want to keep the battery percentage text hidden until the user taps the battery icon (picture). Once tapped the text will show up. Tap the battery again, the text will go back to hidden. I know this could be done using the Legacy Facer tools but I want to keep my design WFF compliant. Any help or ideas will be vastly appreciated. Thank you.