Cutscenes

Cutscenes are usually made using the Timeline Class. Making a new cutscene is simple, as all you really need to do is create a new Timeline object:

t = new Timeline()
.Preload({
    audio: [],
    video: [
      {
        alias: "example_alias",
        src: "assets/example.mp4"
      }
    ]
})
.Do(()=>{
// put code to do what you want to do
})
.Cleanup(()=>{
//use Cleanup (or Do, it's just semantics) to remove anything not cleaned up earlier by the effects themselves.
})

For Timing things, simply use:

.Wait(1000) // 1 Second

.After(4000,()=>{
console.log("I Run after 4 seconds!")
})

If you'd like a more hands on example, here's a gist with a cutscene.