// run at 20 ticks per second, with max frame skip of 5 let game_loop = GameLoop::new(20, 5).unwrap(); // begin core game loop loop { // ... handle window events ... for action in game_loop.actions() { match action { FrameAction::Tick => /* simulate 1 game tick */ FrameAction::Render { interpolation } => /* render the game state interpolated  between previous and next tick */ } } }