How to make a parallax of the starry sky without pictures?

Question

Unity

The game is a space flying game with a top view. Background is the background color of the camera, but it looks empty. I made several transparent pictures with white stars of different sizes and brightness, after which I moved them in the opposite direction from the movement of the camera, and the speed depended on the depth of the layer. So everything works, but I want to try to draw all this only with code.

Is it possible to do this with code without pictures? And if so, how?

Answer 1

google: unity shader skybox
can also be called procedural space
here like this, either you throw a finished picture, or draw literally objects or shaders