// script that makes randomized images
concept G22Challenge > G22LAScript {
  S type = "Single Image";
  bool usesRNG;
  
  // types
  sS type_singleImage = "Single Image";
  sS type_animation = "Animation";
  static LS types = ll(type_singleImage, type_animation);
  
  void _onChange :: after {
    lvType?.set(type);
    lvUsesRNG?.set(usesRNG);
  }
  
  transient SimpleLiveValue<S> lvType;
  synchronized SimpleLiveValue<S> lvType() {
    ret lvType if null = new SimpleLiveValue(S, type).onChange(r {
      setField(type := lvType!);
    });
  }
  
  transient SimpleLiveValue<Bool> lvUsesRNG;
  synchronized SimpleLiveValue<Bool> lvUsesRNG() {
    ret lvUsesRNG if null = new SimpleLiveValue(Bool, usesRNG).onChange(r {
      setField(usesRNG := lvUsesRNG!);
    });
  }
}