let setup = fn() {
  return {
    .color: {
	  .r: 0,
	  .g: 0,
	  .b: 0,
	}
  };
};

let update = fn(state, input) {
  state.color.g = state.color.g + (random_u8() % 3) % 50;
  state.color.b = (state.color.b + 1) % 255;
  return state;
};

let draw = fn(state) {
  frame_clear(state.color.r, state.color.g, state.color.b);
};

let migrate = fn(state) {
    return { .player: { .pos: state.player.position } };
};