# Reference

```namespaces
input.onGesture(Gesture.Shake, () => {})
light.showRing('red red red red red red red red red red')
music.playTone(0, 0)
pins.pulseDuration()
control.runInBackground(() => {})
serial.writeLine("");
```

## See Also

[blocks](/blocks), [JavaScript](/javascript), [input](/reference/input), [light](/reference/light), [music](/reference/music),
[control](/reference/control), [pins](/reference/pins), [serial](/reference/serial)

```package
circuit-playground
```