The sunshine fabric woven pattern looked something like this, in different colors, of course.

Here is what I imagine the moonlight pattern to look like:

And, the stardust pattern will look like this when Mercy finally weaves that fiber.

Interesting tidbits about weaving and spinning:

Winding a warp:

https://youtu.be/JsLHfw6dNWo

Dressing a loom:

https://youtu.be/N_nOl_V6jtE

Throwing the shuttle:

https://youtu.be/tg2ZqO1X-Qs