(Sorry if this have been asked before....)

However I just installed this wonderful contribution and it really looks awesome! But I'm using a black background so the graphics doesn't look too good. I wonder if there are graphics suitable for black backgrounds already made, or do I have to create them myself?

I'm not lazy... but if the effort has already been done by someone who wants to share, I do not see the reason to re-do that work :)

Best regards