export function * Player(game) {
  const transform = new TransformComponent('player')
  const image = new ImageComponent('player', {
    source: game.resources.get('player.png')
  })

  // ... initialize other components ...

  let health = 100

  // task main loop
  while (health > 0) {
    if (game.input.stateOf(0, 'up')) {
      transform.position.y--
    } else if (game.input.stateOf(0, 'down')) {
      transform.position.y++
    }

    // we use yield as a way to interrupt
    // the execution of this task and allow
    // other tasks and other systems to
    // be updated.
    yield
  }

  // when the task is over, we can consider the player
  // entity dead so we can release resources and update other things.

  // ... unregister components ...

  transform.unregister()
  image.unregister()
}

game.scheduler.add(Player(game))

// We can also pass ANY argument to our tasks because
// they're just functions...
game.scheduler.add(Enemy(game, EnemyType.HEAVY, x, y))