While playing with Quartz Composer, the only composition I made with a clear intention of using it was this one:

As you can see, it’s just my band‘s logo, subtly glowing (or breathing, as you wish). It’s a simple but effective animated stage backdrop. I haven’t used it in any of our concert, but next time a video projector is present on stage, I will! :)

As usual, here is the source composition, and a preview of the patch:

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