What is red light on bike?

Hi everyone, still learning and been meaning to ask what the red light on bike below saddle. It has a white light in the middle. I can’t tell what the pattern is when it comes or what it means.
Thanks so much.

If I understand you correctly, the red light is just your tail light. If you were riding in real life at night, you’d want a light on the back so cars (etc.) can see you. Zwift does a virtual one.
I didn’t think there was a pattern. The only time that area of your bike changes is if you come up to an intersection. Then there will be little hologram arrows that point the way you are set to go, until you get through the intersection and the arrows disappear.

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