I'm studying code for a while now. This is the first code I accomplished by myself, with a little help from @barter_nft.
I'm very happy to share it with you, and I hope you like it.

Developed on p5.js
I used Perlin noise for the pixels to create the shady texture, drew some arcs to make the color mixing, random dots for the stars, and cos for the star ways.

I love galaxies and liked the results so much.