I think it's how the light hits the sand. Or maybe my bad editing? lol.

I've heard of parents not enjoying their vacation because they keep thinking about their kids. I should be grateful now that I don't have those kinds of worries yet. 😅

But a parent or not, I think many people have trouble not resorting to their phones when faced with idle time. I sometimes think about what people did when they had nothing to do, and the phone was still not invented.