Click "See inside" and drag the loading bar that says Backpack into your backpack so you can use it in your other projects. Backpack 2 is a bit different, but still works. And if you want, you can write your username under your loading bar. I did mine as a sprite because my loading bar was utter perfection so I didn't want to spoil it and you would have to rub out my name if you got the loading bar off of me.