Hey, so I've just started out my playthrough of Celeste, and I'm currently going for 100% completion.

In the Forsaken City, I found an are with a satellite cycling through a pattern of colors, along with a bunch of colored birds. I don't know if it's tied to one of the games collectibles, but there's obviously something going on. I've taken a screenshot of every color in order to not forget the pattern, thinking it'll come into play later, but the desire not to miss something and to say I've done everything in an area before I move on is just too strong. So if anyone happens to have figured out what to do, send me a PM. Don't wanna ruin the answer for others with such a recent release.