What's the Dot Moving?

Ye'l rot, this van backet of light, exactly. Yeder, that's no difference from we don't have them any more to day. But they'd have what they what they call traces, the the marquise of movie theatres. When people used to go to movie theatres, they would be this a, the text moving across the scree. Well, how does it move? You know, i remember first seeing that beause tat's how old iam sd, how does that move? So you're correct. That point was not that, that lazer point that's on the moonis not what moved across the moon. A separate packet came after