I asked midjourney to generate a few using prompts such as “minimalistic turtle turquoise green --aspect 3:2”:

https://i.imgur.com/HZVtevO.png

https://i.imgur.com/rXMFvzi.png

https://i.imgur.com/Rac2YHu.png

https://i.imgur.com/BZm5onQ.png

https://i.imgur.com/5TVssVP.png

https://i.imgur.com/M51dJUI.png

https://i.imgur.com/BAuu2TN.png

Try these.

https://kldpxl.tumblr.com/ this is a pretty nice collection of some

Desktop or mobile?