At the end of the tutorial, click `keep editing`. Your code should look like this:
```
basic.forever(() => {
let acceleration = input.acceleration("y")
acceleration = math.abs(acceleration)
acceleration = acceleration / 4
led.setBrightness(acceleration)
led.plotAll()
})
```
**Challenge 1**
Hold the BBC micro:bit in your hand in a dark room. Move the BBC micro:bit like a pendulum, and produce a slow image that captures the pattern of the BBC micro:bit LEDs.
**Challenge 2**
Replace "y" in `[input->acceleration("y")] with "x" or "z". Changing the axis will cause the BBC micro:bit to measure the force in a different direction. What differences in the resulting pattern does this replacement make?
