u/Informal_Regular_931

I'm new to learning how to program moving beams, and I've had another model of beams before I got these recent ones. From videos I've seen on YouTube, the beams have the ray of light that appears, which is why they're known as beam because a beam of light shoots out. Even my previous model ones had beams appear, but these don't. Does anyone know how I can solve this issue? I thought it could be a manufacturing issue but I have 12 of these so it can't be that all 12 have an issue with shooting out a beam. I can get the shapes and colors to show but I want to see the trail of light as well.