matter.cs

// Fetching logic
var matters = Api.getUserMatters(userId);
foreach (var matter of matters) {
  GameEngine.getInstance().Matters.add(matter)
  sleep(300)
}

class GameEngine { // Singleton
   public IEnumerable<Matter> Matters;
   public void ExecuteGameLoop () {
     foreach (var matter in this.Matters) {
       if (this.isRendered(matter)) {
         continue;
       }
       this.render(matter)
     }
   }
}