Thank you for positive comment!
If you want to explore different simple things that are possible to create with Metal and run in Swift Playgrounds, you may want to check out my Art-In-Swift ongoing repository:
https://github.com/gadirom/Art-in-Swift
Sometimes I use bare Metal API, but most often I simplify API calls and Metal functions’ declarations with my own declarative wrapper/codegen that makes Metal look a little bit like SwiftUI:
https://github.com/gadirom/MetalBuilder
Gadirom
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