function attachListener ({ cinematicLankBoss, stage }) {
  createjs.Ticker.framerate = 30
  const listener = (e) => {
    cinematicLankBoss.update(true)
    stage.update(e)
  }
  createjs.Ticker.addEventListener('tick', listener)
  // Return listener for removing event.
  return listener
}
Starts the render loop of the stage.
Currently configured for 30 frames per second.

The returned listener can be removed from the Ticker in order to pause rendering.

```js
// Attach listener
const listener = attachListener({ cinematicLankBoss, stage })
// Remove listener again
createjs.Ticker.removeEventListener('tick', listener)
```

@returns {Function} listener that was attached to createjs.Ticker