So I am working on my own theme right now, and i've run into a spot of trouble. In order to make it more authentic, I want to change the line in the media player that separates all the words and stuff to clear, and i also want to make the white part clear.

Ideally, that line that circled and turned red would be clear, and the white part would be clear so i could see the background behind it. Again, this is in the media player.

All I need to know is how to change the line image and the white bg. Any help appreciated!