how do i make art like this>???
Not sure how to answer that! I used Photoshop to create the image assets and the 'Hall of Mirrors' effect was created as a consequence of using a camera in GameMaker Studio 2 and not having a background texture and making sure the application surface isn't refreshed between steps.
If you mean more generally than specifically, then the only advice I can give is do the thing you love doing and keep doing it until you're good at it.